AcWing 899. 编辑距离

#include <iostream>
#include <algorithm>
#include <string.h>
using namespace std;
const int N = , M = ;
int n, m;
int f[N][N];
char str[M][N];
int edit_distance(char a[], char b[]) {
    int la = strlen(a + ), lb = strlen(b + );
    for (int i = ; i <= lb; i ++ ) f[][i] = i;
    for (int i = ; i <= la; i ++ ) f[i][] = i;
    for (int i = ; i <= la; i ++ )
        for (int j = ; j <= lb; j ++ ) {
            f[i][j] = min(f[i - ][j] + , f[i][j - ] + );
            f[i][j] = min(f[i][j], f[i - ][j - ] + (a[i] != b[j]));
        }
    return f[la][lb];
}
int main() {
    scanf("%d%d", &n, &m);
    for (int i = ; i < n; i ++ ) scanf("%s", str[i] + );
    while (m -- ) {
        char s[N];
        int limit;
        scanf("%s%d", s + , &limit);
        int res = ;
        for (int i = ; i < n; i ++ )
            if (edit_distance(str[i], s) <= limit)
                res ++ ;
        printf("%d\n", res);
    }
    return ;
}