题目：http://acm.hdu.edu.cn/showproblem.php?pid=1243
d[i][j] 代表第i 个字符与第 j 个字符的最大的得分。，，
最大公共子序列变形
1 #include <cstring> 2 #include <cstdlib> 3 #include <cstdio> 4 #include <iostream> 5 #include <algorithm> 6 using namespace std; 7 const int maxn = 2000+10; 8 9 char s[maxn], x[maxn], y[maxn]; 10 int f[3000], val[maxn], d[maxn][maxn]; 11 int main() 12 { 13 int n, i, j; 14 int sum; 15 while(~scanf("%d", &n)) 16 { 17 sum = 0; 18 scanf("%s", s); 19 for(i = 0; i < n; i++) 20 scanf("%d", &val[i]); 21 for(i = 0; i < strlen(s); i++) 22 f[s[i]] = val[i]; 23 scanf("%s%s", x, y); 24 int len1 = strlen(x); 25 int len2 = strlen(y); 26 for(i = 0; i <= len1; i++) 27 d[i][0] = 0; 28 for(i = 0; i <= len2; i++) 29 d[0][i] = 0; 30 for(i = 1; i <= len1; i++) 31 for(j = 1; j <= len2; j++) 32 if(x[i-1]==y[j-1]) 33 { 34 d[i][j] = d[i-1][j-1] + f[x[i-1]]; 35 } 36 else 37 { 38 if(d[i-1][j] > d[i][j-1]) 39 d[i][j] = d[i-1][j]; 40 else 41 d[i][j] = d[i][j-1]; 42 } 43 printf("%d ", d[len1][len2]); 44 } 45 return 0; 46 }