题解 | 字符串操作

#include <stdio.h>

int main() {
    int n = 0;
    int m = 0;
    char s[100] = { 0 };
    scanf("%d %d", &n, &m);
    scanf(" %s", s);
    while (m--) {
        int l = 0;
        int r = 0;
        char c1 = 0;
        char c2 = 0;
        scanf("%d %d %c %c", &l, &r, &c1, &c2);
        int i = 0;
        for (i = l - 1; i < r; i++) {
            if (s[i] == c1) {
                s[i] = c2;
            }
        }
    }
    printf("%s\n", s);
    return 0;
}