#include <bits/stdc++.h>
using namespace std;

#ifdef _RUTHEN
#include "debug.hpp"
#else
#define show(...) true
#endif

using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
template <class T> using V = vector<T>;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int tt;
    cin >> tt;
    while (tt--) {
        ll N, M, K;
        cin >> N >> M >> K;
        ll a_0 = K % M;
        cout << (M - a_0 <= N ? 0 : a_0) << '\n';
    }
    return 0;
}