func_code_string: #include <bits/stdc++.h>   using namespace std;   char s[105];   int main() {     int n, m, i, l, r;     char ch1, ch2;     cin >> n >> m;     cin >> (s + 1);     while (m--) {       cin >> l >> r >> ch1 >> ch2;       for (i = l; i <= r; i++)         if (s[i] == ch1) s[i] = ch2;     }     cout << (s + 1);     return 0;   }   