一本通 1298：计算字符串距离

Posted 2022-01-10 benjamin-cpp

计算字符串距离

同样也是字符串距离计算问题，参考一本通 1276：【例9.20】编辑距离

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Code:

#include <iostream>
#include <cstdio>
#include <cstring>
using namespace std;
//Mystery_Sky
//
#define INF 0x3f3f3f3f
#define M 3000
int f[M][M];
int len_a, len_b;
char a[M], b[M];
int main() 
    int t;
    scanf("%d", &t);
    getchar();
    while(t--) 
        memset(f, 0, sizeof(f));
        scanf("%s", a);
        getchar();
        scanf("%s", b);
        len_a = strlen(a);
        len_b = strlen(b);
        for(int i = 1; i <= len_a; i++) f[i][0] = i;
        for(int i = 1; i <= len_b; i++) f[0][i] = i; 
        for(int i = 1; i <= len_a; i++) 
            for(int j = 1; j <= len_b; j++) 
                if(a[i-1] == b[j-1]) 
                    f[i][j] = f[i-1][j-1];
                
                else f[i][j] = min(min(f[i-1][j], f[i][j-1]), f[i-1][j-1]) + 1;
            
        
        printf("%d\\n", f[len_a][len_b]);
    
    return 0;