func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:1024000000,1024000000 )   using namespace std;   int main() {     int n;     cin >> n;     if (n % 2 == 0) {       cout << (n / 2) - 1 << endl;     } else {       cout << n / 2 << endl;     }     return 0;   }   