#line 2 "/home/cocojapanpan/Procon_CPP/proconLibrary/lib/template/procon.hpp"

#ifndef DEBUG
// 提出時にassertはオフ
#ifndef NDEBUG
#define NDEBUG
#endif
// 定数倍高速化
#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#endif

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

#define ALL(x) (x).begin(), (x).end()
template <class T>
using vec = vector<T>;
template <class T, class S>
inline bool chmax(T &a, const S &b) {
    return (a < b ? a = b, 1 : 0);
}
template <class T, class S>
inline bool chmin(T &a, const S &b) {
    return (a > b ? a = b, 1 : 0);
}
template <class T>
constexpr T INF = 1'000'000'000;
template <>
constexpr int INF<int> = 1'000'000'000;
template <>
constexpr ll INF<ll> = ll(INF<int>) * INF<int> * 2;
#line 2 "main.cpp"

void solve() {
    ll N;
    cin >> N;
    if(N == 0) {
        cout << 2 << "\n";
        return;
    }
    // N以下で最大の10の倍数aを求める
    ll a = (N / 10) * 10;
    ll ans = 1;
    // 1 + N + N(N-1) + ... N...(a+1)
    ll curPlus = 1;
    for(ll i = N; i >= a + 1; i--) {
        curPlus *= i;
        curPlus %= 10;
        ans += curPlus;
        ans %= 10;
    }
    cout << ans << "\n";
}

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int T;
    cin >> T;
    for(int i = 0; i < T; i++) {
        solve();
    }
}