func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(nullptr);     string n;     int k;     cin >> n >> k;     int ans = 0;     int p = 0;     for (auto it = n.rbegin(); p < k && it != n.rend();) {       if (*it !=  0 ) {         ++ans;         n.erase((++it).base());       } else {         ++it;         ++p;       }     }     for (auto it = n.begin(); it != n.end() && it + 1 != n.end(); ++it) {       if (*it ==  0 ) {         ++ans;       } else {         break;       }     }     cout << ans << endl;     return 0;   }   