func_code_string: #include <bits/stdc++.h>   using namespace std;   bool isPrime(int n) {     if (n <= 1) return false;     if (n <= 3) return true;     if (n % 2 == 0 || n % 3 == 0) return false;     for (int i = 5; i * i <= n; i = i + 6)       if (n % i == 0 || n % (i + 2) == 0) return false;     return true;   }   void solve() {     int n;     cin >> n;     long double pi = 2.0 * acos(0.0), ans, x;     x = pi / (long double)(2.0 * n);     ans = tan(x);     cout << fixed << setprecision(9) << 1.0 / ans <<   n ;   }   int main() {     ios_base::sync_with_stdio(0);     cin.tie(NULL);     cout.tie(NULL);     ;     int t;     cin >> t;     while (t--) {       solve();     }     return 0;   }   