func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, c = 0;     cin >> n;     if (n == 1 || n == 2)       cout << 0 << endl;     else if (n % 2 == 0) {       int temp = 1;       while (n >= temp * 2) {         temp *= 2;       }       cout << (n - temp) / 2 << endl;     } else       cout << n / 2 << endl;   }   