C++ :

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

int main() {
	int t;
	cin >> t;
	while(t--) {
		int h, ha, hb, ua, ub, adda, addb, da, db, suba, subb;
		cin >> h >> ha >> hb >> ua >> ub >> adda >> addb >> da >> db >> suba >> subb;
		int cnt = 0;
        while(ha < h || hb < h) {
            cnt++;
            if(ha > hb) hb += addb;
            else if(hb > ha) ha += adda;
            hb += ub;
            ha += ua;
            if(ha >= h) ha = 1e7;
            if(hb >= h) hb = 1e7;
            if(ha < hb) ha += suba;
            else if(hb < ha) hb += subb;
            ha -= da;
            hb -= db;
        }
        cout << cnt << endl;
	}

	return 0;
}