func_code_string: #include <bits/stdc++.h>   using namespace std;   const long INF = (long)1e09;   int n, m, k, p = 0, id, inv, minv, ans, d = -2;   int main() {     scanf( %d , &n);     if (n == 3) {       cout << 5;       return 0;     }     if (n == 1) {       cout << 1;       return 0;     }     for (m = 3; (m * m + 1) / 2 < n; m += 2)       ;     printf( %d , m);   }   