func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, x, y;     cin >> n >> x >> y;     string num;     cin >> num;     num = num.substr(num.length() - x, x);     cout << count(num.begin(), num.end() - y - 1,  1 ) +                 count(num.end() - y, num.end(),  1 ) +                 (*(num.end() - y - 1) ==  1  ? 0 : 1);     return 0;   }   