import sys
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
INF = 2 ** 63 - 1
mod = 998244353
def solve():
    n, m, k = mi()
    now = m
    while now > m - n:
        k = k % now
        now = max(k, m - n)
    print(k % now)

for _ in range(ii()):
    solve()