编辑距离

编辑距离既是指给定两个字符串，给定添加，删除，改变3种操作，求定最少的操作次数：

#include <bits/stdc++.h>using namespace std;typedef long long LL;const int inf = 0x3f3f3f3f, N = 1e3 + 5, MOD = 1e9 + 7;int T, cas = 0;int n, m;int dp[N][N];char s[N], t[N];int main(){    while(scanf("%s%s",s,t) != EOF) {    int n = strlen(s), m = strlen(t);    for(int i = 0; i <= n; i ++) dp[i][0] = i;    for(int i = 0; i <= m; i ++) dp[0][i] = i;    for(int i = 1; i <= n; i ++) {    for(int j = 1; j <=m; j ++) {    dp[i][j] = min(dp[i-1][j], dp[i][j-1]) + 1;    dp[i][j] = min(dp[i][j], dp[i-1][j-1] + (s[i-1] != t[j-1]));    }    }    printf("%d\n", dp[n][m]);    }    return 0;}