func_code_string: #include <bits/stdc++.h>   using namespace std;   using ll = long long;   using P = pair<ll, ll>;   using PP = pair<ll, P>;   using VB = vector<bool>;   using VI = vector<ll>;   using VS = vector<string>;   using VC = vector<char>;   using VP = vector<P>;   using VPP = vector<PP>;   using VD = vector<double>;   using VVI = vector<VI>;   using VVP = vector<VP>;   using VVC = vector<VC>;   using VVB = vector<VB>;   using VVVI = vector<VVI>;   int main() {     int n, k;     cin >> n >> k;     for (int i = 0; i < k; i++) {       if (n % 10 == 0)         n /= 10;       else         n--;     }     cout << n << endl;   }   