def one_str():
    return input()

def many_int():
    return list(map(int, input().split()))

input_count = 0
T = int(input())

def calc(N, M, K):
    count = 0
    K = K%M
    if K >= M-N:
        return 0
    else:
        return K

for i in range(T):
    N, M, K = many_int()
    print(calc(N,M,K))