#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include <map>
#include <vector>
#include <queue>
#include <deque>
#include <set>
#include <stack>
#include <algorithm>
#include <array>
#include <unordered_set>
#include <unordered_map>
#include <string>
using namespace std;

bool rcmp(int a, int b) { return a>b; }
typedef long long LL;
class mypcmp {
public:
    bool operator()(const int& a, const int& b) {
        return a<b;
    }
};



int main() {
    int r;
    LL n, b, i;
    int tc; scanf("%d", &tc); while(tc) { tc--;
        scanf("%lld", &n);
        r=1; b=1;
        for (i=n-1; i>=0; i--) {
            b*=((i+1)%10); b%=10;
            if (b==0) break;
            r+=b; r%=10;
        }
        printf("%d\n", r);
    }

    return 0;
}