#include <iostream>
using namespace std;

int main() {
	cin.sync_with_stdio(0);
	cin.tie(0);
	int T;
	cin >> T;
	while(T--) {
		int X, Y, Z;
		cin >> X >> Y >> Z;
		int M = 0;
		while(Y+(M+1)*X <= Z) M++;
		cout << M << "\n";
	}
}