func_code_string: #include <bits/stdc++.h>   using namespace std;   const int oo = 0x7fffffff;   const long long OO = 1000000000000000000LL;   const int base = 1000000007;   const int dx[] = {1, 0, 0, -1};   const int dy[] = {0, 1, -1, 0};   int x;   int main() {     ios_base::sync_with_stdio(false);     cin >> x;     if (x == 2) {       cout << 3 << endl;       return 0;     }     if (x == 3) {       cout << 5;       return 0;     }     for (int n = 1;; n += 2) {       int count = (n / 2 + 1) * (n / 2 + 1) + (n / 2) * (n / 2);       if (count >= x) {         cout << n;         return 0;       }     }     return 0;   }   