#include <bits/stdc++.h>
#define be(v) (v).begin(),(v).end()
#define pb(q) push_back(q)
#define rep(i, n) for(int i=0;i<n;i++)
#define all(i, v) for(auto& i : v)
typedef long long ll;
using namespace std;
const ll mod=1000000007, INF=(1LL<<60);
#define doublecout(a) cout<<fixed<<setprecision(10)<<a<<endl;

// ctrl-E

ll calc(ll n) {
    if(n % 10 == 0) return 1;
    ll ret = 1 + (n % 10) * calc(n - 1);
    return ret % 10;
}
void solve() {
    ll n;
    cin >> n;
    cout << calc(n) << endl;
}
int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int t;
    cin >> t;
    while(t--) solve();
    return 0;
}