ZOJ1733 | | HDU1159简单的DP求两个字符串最大子序列的长度，没啥好说的，照着书上敲得。

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 1 #include<stdio.h>
 2 #include<stdlib.h>
 3 #include<string.h>
 4 #define MAX 1000
 5 
 6 int c[MAX][MAX],len1,len2;
 7 char x[MAX],y[MAX];
 8 void LCSLength(int m,int n,char *x,char *y)
 9 {
10    int i,j;
11    for(i=0; i<m; i++)   
12      c[i][0] = 0;  
13    for(i=0; i<n; i++)
14     c[0][i] = 0;  
15    for(i=0; i<m; i++)
16     for(j=0; j<n; j++)
17     {
18       if(x[i] == y[j])
19       {
20          c[i+1][j+1] = c[i][j] + 1;                   
21       }
22       else if(c[i][j+1] >= c[i+1][j])
23       { 
24          c[i+1][j+1] = c[i][j+1];
25       }  
26       else
27       {    
28         c[i+1][j+1] = c[i+1][j]; 
29       }  
30     }
31 }
32 
33 int main()
34 {
35     
36    while(scanf("%s%s",x,y) != EOF )
37    { 
38      getchar();              
39      len1 = strlen(x); 
40      len2 = strlen(y);
41      LCSLength(len1,len2,x,y); 
42      printf("%d\n",c[len1][len2]);
43    } 
44    return 0; 
45 }
posted @ 2012-03-21 21:41  zhongya  阅读(216)  评论(0)    收藏  举报