Arvonta

#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef long double ld;


int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int t;
    cin >> t;
    for (int i = 0; i < t; i++) {
        ld n;
        cin >> n;
        ld prod = 1;
        for (int j = 0; j < n; j++) {
            prod *= (n-1)/n;
        }
        cout << setprecision(20) << 1 - prod << "\n";
    }
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED