func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long int N = 2e5 + 5;   void solve() {     long long int n;     cin >> n;     long long int k = sqrt(n);     long long int sum = 0;     if (n == k * k) {       cout << 4 * k <<   n ;       return;     }     sum = sum + k * 4;     n = n - (k * k);     if (n > (k)) {       sum = sum + (n / (k)) * 2;       if (n % k != 0) sum = sum + 2;     } else {       sum = sum + 2;     }     cout << sum <<   n ;   }   signed main() {     ios_base::sync_with_stdio(false);     cin.tie(0);     cout.tie(0);     long long int t = 1;     while (t--) solve();     return 0;   }   