#include <bits/stdc++.h>

using namespace std;

typedef long long ll;

int main()
{
    ll n;
    ll p, q, r;
    ll a, b, c;
    cin >> n >> p >> q >> r >> a >> b >> c;
    ll cur = a;
    ll cur2 = p;
    for (int i = 0; i < q; ++i) {
        if (cur % q == b) break;
        cur += cur2;
    }
    cur2 *= q;
    for (int i = 0; i < r; ++i) {
        if (cur % r == c) break;
        cur += cur2;
    }
    cur2 *= r;
    if (cur > n) {
        cout << 0 << endl;
        return 0;
    }
    n -= cur;
    cout << n / cur2 + 1 << endl;
}