func_code_string: #include <bits/stdc++.h>   using namespace std;   int64_t binexp(int64_t base, int64_t exponent) {     int64_t res = 1;     base = (base + 1000000007) % 1000000007;     while (exponent) {       if (exponent & 1) {         res = (res * base) % 1000000007;       }       exponent = exponent >> 1;       base = (base * base) % 1000000007;     }     return res;   }   void solve() {     double n;     cin >> n;     n = 2.0 * n;     double param, result;     param = (3.14159265 / n);     result = sin(param);     double ans1 = (1.0 / (result));     double res = cos(param / 2.0);     double ans2 = (1.0 * res);     double ans = (ans1 * ans2);     printf( %.10f n , ans);   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int T = 1;     cin >> T;     while (T--) {       solve();     }     return 0;   }   