题解 | #字符串操作#

#include <stdio.h>

int main() {
    int n = 0;
    int m = 0;
    scanf("%d %d",&n,&m);
    char arr[1000] = {0};
    scanf("%s",arr);
    getchar();
    for (int i = 0; i < m; i++)
    {
        int start = 0;
        int end = 0;
        char c1 = 0;
        char c2 =0;
        scanf("%d %d",&start,&end);
        getchar();
        c1 = getchar();
        getchar();
        c2 = getchar();
        getchar();
        
        for (int j = start; j <= end; j++)
        {
            if (arr[j-1] == c1)
            {
                arr[j-1] = c2;
            }
        }
    }

    printf("%s",arr);
    return 0;
}