Arvonta

#include <bits/stdc++.h>

#define ld long double

using namespace std;

ld pot(ld x, int k) {
    if (k == 0) return 1;
    if (k & 1) return x * pot(x, k - 1);
    ld u = pot(x, k / 2);
    return u * u;
}

int main() {
    int t;
    cin>>t;
    cout<<setprecision(10)<<fixed;
    for (int i = 0; i < t; i++) {
        int N;
        cin>>N;
        ld n = N;
        n = 1 / n;
        cout<<(1 - pot(1 - n, N))<<endl;
    }
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED