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			Nguyên lí “chia để trị” thường đóng vai trò chủ đạo trong việc thiết kế thuật toán: để giải quyết một bài toán lớn, chúng ta chia nó thành nhiều bài toán con có thể giải quyết được độc lập
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			<div style="text-align: justify;"><span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>1. Nguyên lí tối ưu của Bellman</b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Trong một dãy tối ưu các lựa chọn thì mọi dây con của nó cũng tối im.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Điều kiện tối ưu không phụ thuộc vào tiền sử của hệ điều khiển mà chỉ phụ thuộc vào trạng thái tức thời và mục tiêu cuối cùng của hệ điều khiển.</span></span></span><br />
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<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>2. Kĩ thuật của qui hoạch động</b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Lập chương trình qui hoạch động.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Lập bảng lưu lại các nghiệm của bài toán con.</span></span></span><br />
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<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>3. Triết lí của qui hoạch động</b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Nguyên lí “chia để trị” thường đóng vai trò chủ đạo trong việc thiết kế thuật toán: để giải quyết một bài toán lớn, chúng ta chia nó thành nhiều bài toán con có thể giải quyết được độc lập.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Trong phương pháp qui hoạch động, việc thể hiện nguyên lí này được đẩy đến cực độ.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">• Khi không biết chắc cần giải quyết bài toán con nào chúng ta , giải quyết tất cả các bài toán con và lưu trữ những lời giải này với mục đích sử dụng lại chúng theo một sự phôi hợp nào đó để giải quyết các bài toán tổng quát hơn.</span></span></span><br />
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<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b>4. Hạn chế của phương pháp qui hoạch động</b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Không phải lúc nào sự kết hợp lời giải của các bài toán con cũng cho ta lời giải của bài toán lớn hơn.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Số lượng các bài toán con cần giải quyết và lưu trữ đáp án có thể rất lớn, không thể chấp nhận được.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif"><i><u>■ Ví dụ 1:</u></i></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Cho n đồ vật, đồ vật thứ i có thể tích là V&#91;i&#93; và có giá trị là p&#91;i&#93;. Cần phải quyết định xem nên xếp những vật nào trong n vật trên vào trong một ba lô có thể tích V sao cho tổng giá trị của đồ vật được xếp vào ba lô là cực đại.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><u>Giải</u></b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Ta phải tìm &#91;L<sub>1</sub> L<sub>2</sub>, L<sub>3</sub>, L<sub>n</sub>&#93; với L<sub>1</sub></span></span></span><img alt="" height="24" src="https://sachgiai.com/uploads/news/2020_08/image-20200810224233-1.png" width="12" /><span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif"><span style="font-size:14.0pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,&#039;serif&#039;"><span style="position:relative"><span style="top:4.5pt"> </span></span></span></span></span>{0,1} thỏa:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; ΣL<sub>i</sub>V<sub>i</sub> ≤ V</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">và ΣL<sub>i</sub>P<sub>i</sub> đạt Max.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Đặt M&#91;i,j&#93; là giá trị lớn nhất đạt được của ba lô khi xét đến vật thứ i có thể tích còn lại là j.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Ta có phương trình qui hoạch động:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">M&#91;i,j&#93; = Max{M&#91;i-1,j-V&#91;i&#93;&#93; + P&#91;i&#93; ;M&#91;i-1,j&#93;)</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Chương trình PASCAL đầy đủ như sau:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Program balo:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">uses crt;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Const</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MaxVat=50 ;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; MaxKt=100 ;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Var M: Array&#91;0..MaxVat,0..MaxKt&#93; of word;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; v,p: Array&#91;1..MaxVat&#93; of byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; Lap: Array&#91;l..MaxVat&#93; of boolean;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; so vat, kt: byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Procedure Nhap;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">var i: byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; clrscr;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; Writeln(‘CHUONG TRINH XEP BALO&#039;) ;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; Writeln(‘…………………………………’);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; fillchar(p,sizeof(p),0);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; fillchar(p,sizeof(v),0);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; Write(Nhap so do vat can xep &#91;1..&#039;&lt;MaxVat,&#039;&#93; :&nbsp;&nbsp; &nbsp;&#039;) ;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; Readln(sovat);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; Write(‘Nhap the tich balo &#91;1..&#039;,MaxKt,’&#93; : &#039;).;readln(Kt);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; For i: = 1 to sovat do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Write(‘Nhap vat thu&#039;,i,&#039;&#91;V-$&#93; : &#039;);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; readln(v&#91;i&#93;,p&#91;i&#93;) ;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; End;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Writeln(‘Solving...’);delay(100);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">End;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Function GetMax(a,b: word) : Word;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; if a &gt; b then GetMax : = a else GetMax: = b;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Procedure Taobang;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">var i,j : byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; Fillchar(M,Sizeof(m),0) ;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; fillchar(lay,sizeof(lay),false);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; For i : = 1 to sovat do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; For j : = kt down to 1 do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If j - V&#91;i&#93; &gt;= 0 then M&#91;i,j&#93; : = GetMax(M&#91;i-1,j-v&#91;i&#93;&#93; + p&#91;i&#93;,</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; M&#91;i-1,j&#93;)</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Else M&#91;i,j&#93; : = M&#91;i-1,j&#93;;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; End;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">End;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Procedure InBang;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">var i,j : byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; for i: = 0 to sovat do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;for j : = 0 to Kt do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Write(M&#91;i,j&#93; : 3);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Writeln;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp; &nbsp;&nbsp;end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Procedure TruyHoi;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Var i,1 : byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; max : word;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Max : = 0;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for i : = 1 to Kt do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If Max &lt;- M&#91;sovat,i&#93; then</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Max : = M&#91;sovat,i&#93; ;1: = i</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; For i : = sovat down to 1 do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If M&#91;i,1&#93; &lt; &gt; M&#91;i-1,1&#93; then</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Lay &#91;i&#93; : = true;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1 : = 1-V&#91;i&#93;;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; End;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; End;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; writeln;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; write!(&#039;Lay cac vat :’) ;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; For i : = 1 to sovat do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; If lay&#91;i&#93; then write(i: 3);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; Write(‘Gia tri tong cong: ’,Max);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; readln;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; Nhap;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; Taobang;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; {InBang;}</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; Truyhoi;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">end.</span></span></span><br />
<br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif"><i><u>■ Ví dụ 2:</u></i> Cho G = (V,E) là đồ thị có hướng. V là tập đỉnh. E là tập cạnh. Mỗi cạnh có độ dài dương, cần tìm đường đi ngắn nhất nối mỗi cặp đỉnh.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif"><b><u>Giải</u></b></span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Theo nguyên lí tối ưu của qui hoạch động:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Nếu đường đi ngắn nhất từ i đến j có đi qua k thì phần của đường đi đó từ i đến k và từ k đến j cũng phải ngắn nhất.</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Đặt A&#91;i,j&#93; là độ dài đường đi ngắn nhất từ i đến j. Ta xây dựng A như sau:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Lúc đầu A: = D;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">- Sau đó lặp n lần, sau lần lặp thứ k, A sẽ cho độ dài các đường đi ngắn nhất trong các đỉnh |1,2,...,k&#93;. Ta có phương trình qui hoạch động để tính A ở bước k:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">A<sub>k</sub>&#91;i,j&#93; = Min {A<sub>k-1</sub>&#91;i,j&#93;, A<sub>k-1</sub>&#91;i,k&#93; + A<sub>k-1</sub>&#91;k,j&#93;}</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Chương trình PASCAL đầy đủ như sau:</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; uses crt;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">const maxn = 100;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">var a: array&#91;1..maxn,1..maxn&#93; of word;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c: array&#91;1..maxn,1..maxn&#93; of byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; dinh dau,dinh cuoi: byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; n: byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; found: boolean;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; m: byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d: word;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">procedure floydbellman;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var i,j,k : byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for k: = 1 to n do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for i: = 1 to n do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; for j: = 1 to n do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if (a&#91;i,k&#93;+a&#91;k,j&#93;&lt;a&#91;i,j&#93;) then</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a&#91;i,j&#93; : = a&#91;i,k&#93;+a&#91;k,j&#93;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; a&#91;i,j&#93; : = a&#91;i,j&#93;;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; c&#91;i,j&#93; : = k;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;c&#91;j,i&#93;: = c&#91;i,j&#93;;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Procedure find(i j : byte);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; if (c&#91;i,j&#93; = 0) then</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; if a&#91;i,j&#93; = maxint then found : = false</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; esle if moi then write(i: 2,&#039;-&gt;&#039;);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp; else</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Find(i,c&#91;i,j&#93;) ;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Find(c&#91;i,j&#93;,j) ;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Write(j : 2,&#039;-&gt;’)</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; M : = j;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Procedure Nhap;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var i,j : byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; d: word;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; f: text;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Assign(f,&#039;d: \tp5\Fb.inp&#039;);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Reset(f);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Readln(f,n);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; For i : = 1 to n do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;For j : = 1 to n do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Read(f,n);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; If d&lt; &gt;0 then A&#91;i,j&#93; : = d;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Readln(f);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; End;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Closet (f);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">End;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Procedure Xuat;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;Begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Repeat</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Writeln;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Write(‘Nhap dinh dau :&#039;);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Readln(dinh_dau);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Write(‘Nhap dinh cuoi :’);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Readln(dinh_cuoi);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; found : = true;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; m : = maxn+1;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">fin(dinh_dau,dinh_cuoi);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">if not found then writeln(‘khong co duong di tu&#039;,dinh_dau,&#039;den&#039;,dinh_cuoi,&#039;.&#039;)</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; else</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; GotoXY(Where-2,Wherey);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Writeln(‘ &#039;)</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Write(‘tiep tuc (C/K) ?&#039;);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; Until Upcase (readkey) &lt; &gt; &#039;c&#039;;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">Procedure Khoitao;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; var i,j: byte;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; begin</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;For i : = 1 to maxn do</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;For j : = 1 to maxn do a&#91;i,j&#93; : = maxint</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;For i : = 1 to maxn do a&#91;i,i&#93; : = 0;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;FillChar(c,Sizeof(c),0);</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; end;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">BEGIN</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; khoitao;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; Nhap;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; Floydbellman;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">&nbsp;&nbsp;&nbsp;&nbsp; Xuat;</span></span></span><br />
<span style="font-size:14pt"><span style="line-height:107%"><span style="font-family:&#039;Times New Roman&#039;,serif">END.</span></span></span></div>
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