编辑距离 51Nod - 1183

 1 #include <bits/stdc++.h>
 2 using namespace std;
 3 const int maxn = 1010;
 4 
 5 char s[maxn], p[maxn];
 6 int dp[maxn][maxn];
 7 
 8 int main(){
 9     scanf("%s %s", s, p);
10     int n = strlen(s);
11     int m = strlen(p);
12     for(int i = 0; i <= n; i++) dp[i][0] = i;
13     for(int i = 0; i <= m; i++) dp[0][i] = i;
14     for(int i = 1; i <= n; i++){
15         for(int j = 1; j <= m; j++){
16             dp[i][j] = min(dp[i-1][j], dp[i][j-1]) + 1;
17             dp[i][j] = min(dp[i][j], dp[i-1][j-1] + (s[i-1] != p[j-1]));
18         }
19     }
20     printf("%d\n", dp[n][m]);
21 }