#!/usr/bin/env PyPy3

from collections import Counter, defaultdict, deque
import itertools
import re
import math
from functools import reduce
import operator
import bisect
from heapq import *
import functools
mod=998244353

import sys
input=sys.stdin.readline
t = int(input())
for _ in range(t):
    n,m,k=map(int,input().split())
    if k % m >= m - n:
        print(0)
    else:
        print(k % m)