[SWEA] min max

test_case= int(input())

for tc in range(1, test_case+1):
    N = int(input())
    num = list(map(int, input().split()))
    max_num = num[0]
    min_num = num[0]
    num = 0
    for i in range(N):
        if num[i] > max_num:
            max_num = num[i]
        if num[i] < min_num:
            min_num = num[i]
    num = max_num - min_num
    print("#{} {}".format(tc, j))