func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 2e5 + 1;   long double pi = 3.141592653589793238;   int main() {     long long t;     cin >> t;     while (t--) {       long long x;       cin >> x;       long double ans;       long double n = 2.0000000000000 * (long double)x;       long double angle =           (180.000000000000000 - 360.00000000000000 / n) / 2.00000000000000;       angle = angle * pi / 180.000000000000;       long double side = (long double)0.500000000000 / (long double)cosl(angle);       if (x % 2 != 0) {         ans = (long double)2.000000000 * side;       } else {         side = side * (long double)sinl(angle);         ans = (long double)2.000000000 * side;       }       cout << to_string(ans) <<   n ;     }   }   