func_code_string: #include <bits/stdc++.h>   using namespace std;   template <class A, class B>   ostream &operator<<(ostream &out, const pair<A, B> &a) {     return out <<  (  << a.first <<  ,  << a.second <<  ) ;   }   template <class A>   ostream &operator<<(ostream &out, const vector<A> &a) {     for (const A &it : a) out << it <<    ;     return out;   }   template <class A, class B>   istream &operator>>(istream &in, pair<A, B> &a) {     return in >> a.first >> a.second;   }   template <class A>   istream &operator>>(istream &in, vector<A> &a) {     for (A &i : a) in >> i;     return in;   }   signed main() {     ios_base::sync_with_stdio(0);     cin.tie(0);     long long n, x, y;     cin >> n >> x >> y;     string s;     cin >> s;     reverse((s).begin(), (s).end());     long long cnt = 0;     for (long long i = 0; i < x; i++) {       if ((i == x || i == y)) {         cnt += s[i] ==  0 ;       } else         cnt += s[i] ==  1 ;     }     cout << cnt;   }   