import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
n = ni()

def f(a, b):
    res = 1
    for i in range(a, a-b, -1):
        res *= i
        res %= 10
    return res

for _ in range(n):
    N = ni()
    ans = 0
    for k in range(min(10, N+1)):
        ans += f(N, k)
        ans %= 10
    print(ans)