#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
using ll = long long;

int T, N, M, K, A;

int main() {
  cin >> T;
  while (T--) {
    cin >> N >> M >> K;
    A = K % M;
    cout << (A < M - N ? A: 0) << endl;
  }
  return 0;
}