func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n = 0;     cin >> n;     int a = (int)sqrt(n);     if (a * a == n) {       cout << a * 4 << endl;     } else if (a * (a + 1) >= n) {       cout << a * 4 + 2 << endl;     } else {       cout << a * 4 + 4 << endl;     }     return 0;   }   