#include <bits/stdc++.h>
using namespace std;
using i64 = int64_t;
void chmax(i64& a, i64 b) {if(a < b) a = b; }


i64 solve() {
    i64 N;
    cin >> N;
    vector<pair<i64, i64>> A(3);
    for(auto& [a, b] : A) cin >> a >> b;
    sort(A.begin(), A.end(), [&](pair<i64, i64> a, pair<i64, i64> b) { return a.first * b.second < a.second * b.first; });
    
    const i64 MX = 4e6;
    vector<i64> dp(MX + 1);
    for(i64 i = 0; i < MX; i++) for(auto [a, b] : A) if(i + a <= MX) chmax(dp[i + a], dp[i] + b);
    if(N <= MX) return dp[N];
    const auto [a, b] = A[0];
    for(i64 i = MX; ; i--) if((N - i) % a == 0) return dp[i] + (N - i) / a * b;
}
int main() {
    cout << solve() << endl;
}