Arvonta

#include <bits/stdc++.h>
#define F first
#define S second
#define X real()
#define Y imag()
using namespace std;
typedef long long ll;
typedef long double ld;


int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int tcs;
    cin>>tcs;
    cout<<setprecision(10);
    for (int tc=0;tc<tcs;tc++) {
        int n;
        cin>>n;
        ld comp = 1.0;
        ld fac = comp - (comp/n);
        for (int i=0;i<n;i++) comp *= fac;
        ld res = 1.0 - comp;
        cout << res << "\n";
    }
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED