T = int(input())
ANS = []
def solve(n,m,k):
    a0 = k % m
    if m-a0 > n:
        return a0
    else:
        return 0
for _ in range(T):
    N,M,K = map(int,input().split())
    ANS.append(solve(N,M,K))
print(*ANS,sep='\n')