func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, r, s1, s2, d;     cin >> n;     r = ceil(double(sqrt(n)));     s1 = r * r;     s2 = (r - 1) * (r - 1);     d = s1 - s2;     d = d / 2;     d = s1 - d;     if (n < d) {       cout << (r * 2) - 1;     } else {       cout << r * 2;     }   }   