Arvonta

#include <bits/stdc++.h>

#define MODE 1

#if MODE
#define debug(x) cout << #x << ": " << (x) << endl
#define log(x) cout << (x) << endl
#define test(x) x
#else
#define debug(x)
#define log(x)
#define test(x)
#endif

#define all(x) (x).begin(),(x).end()
#define rall(x) (x).rbegin(),(x).rend()
#define fi first
#define se second
#define X real()
#define Y imag()

using namespace std;
using ll = long long;
using ld = long double;
using uint = unsigned int;
using ull = unsigned long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
using P = complex<ll>;

template<typename S, typename T = S> void chmin(S &s, T t) {s = s < t ? s : t;}
template<typename S, typename T = S> void chmax(S &s, T t) {s = s > t ? s : t;}

const ll M = 1000000007; // 998244353

void solve() {
    int n;
    cin >> n;
    
    ld p = 1 - 1.0 / n;
    ld q = 1;
    for (int i = 0; i < n; ++i) q *= p;
    q = 1-q;
    cout << fixed << setprecision(9);
    cout << q << '\n';
}

int main() {
    cin.tie(0) -> sync_with_stdio(0);
    
    int t = 0;
    if (t == 0) cin >> t;
    while (t--) solve();
    
    return 0;
}

Test 1

Group: 1, 2

Verdict: ACCEPTED

Test 2

Group: 2

Verdict: ACCEPTED