
졸려서 풀이과정은 내일 써야지용용
T = int(input())
for test_case in range(1, T+1):
N = int(input())
prices = list(map(int, input().split()))
result = 0
while len(prices) > 0:
maxidx = prices.index(max(prices))
for i in prices[:maxidx]:
result += prices[maxidx] - i
prices = prices[maxidx+1:]
print(f'#{test_case} {result}')
