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

void solve() {
    int n, m, k;
    cin >> n >> m >> k;

    k %= m;
    if (k >= m - n) k = 0;

    cout << k << '\n';
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    int t;
    cin >> t;

    while (t--) {
        solve();
    }

    return 0;
}