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

int main()
{
	int T;
	cin >> T;

	for( int i = 0; i < T; i++ ) {
		int N, M, K;
		cin >> N >> M >> K;
		int a = K % M;
		int d = M - a;
		if( d <= N ) a = 0;
		cout << a << endl;
	}
}