HZNUOJ


Problem_ID: A
Result: Accepted
Time: 270ms
Memory: 25312kB
Author: 13967792528
In contest: 1296

for tcase in range(int(input())):
    n,k,m=map(int,input().split())
    money=list(map(int,input().split()))
    money.sort()
    print(sum(money[:k])-n if sum(money[:k])>=n else 0)