#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
#define drep(i, cc, n) for (ll i = (cc); i <= (n); ++i)
#define rep(i, n) drep(i, 0, n - 1)
#define all(a) (a).begin(), (a).end()
#define pb push_back
#define fi first
#define se second

mt19937_64 rng(chrono::system_clock::now().time_since_epoch().count());
const ll MOD1000000007 = 1000000007;
const ll MOD998244353 = 998244353;
const ll MOD[3] = {999727999, 1070777777, 1000000007};
const ll LINF = 1LL << 60;
const int IINF = (1 << 30) - 1;

template<typename T> struct Edge{
    int to; T w;
    Edge(int to_, T w_=1){
        to = to_;
        w=w_;
    }
};
template<typename T> using Tree = vector<vector<Edge<T>>>;
template<typename T> using Graph = vector<vector<Edge<T>>>;
/* 容量&重み付きエッジ for Dinic */
template<typename T> struct REdge{
    int to;
    T cap;
    T cost;
    int rev;
    REdge(int to_, T cap_, T cost_=1){
        to = to_;
        cap = cap_;
        cost = cost_;
    }
    
    REdge(int to_, T cap_, T cost_, int rev_){
        to = to_;
        cap = cap_;
        cost = cost_;
        rev = rev_;
    }
};

/* 残余グラフ for Dinic */
template<typename T> using RGraph = vector<vector<REdge<T>>>;

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    
    ll N; cin >> N;
    vector<ll> A(3), B(3);
    rep(i, 3) cin >> A[i] >> B[i];
    ll L = A[0];
    L = L/__gcd(L, A[1])*A[1];
    L = L/__gcd(L, A[2])*A[2];

    ll Lcost = max((L/A[0])*B[0], max((L/A[1])*B[1], (L/A[2])*B[2]));

    ll SL = A[0];
    SL = SL/__gcd(SL, A[1])*A[1];
    ll SLcost = max((SL/A[0])*B[0], (SL/A[1])*B[1]);

    vector<ll> dp(8e6+1, 0);
    for(ll i=1; i<=8e6; i++){
        dp[i] = dp[i-1];
        if(i-A[0]>=0){
            dp[i] = max(dp[i], dp[i-A[0]]+B[0]);
        }
        if(i-A[1]>=0){
            dp[i] = max(dp[i], dp[i-A[1]]+B[1]);
        }
    }

    ll ans = 0;
    for(ll k=0; k<L/A[2]; k++){
        ll sans = 0;
        ll SN = N - k*A[2];
        sans = k*B[2];
        if(SN<0) break;

        ll Lcnt = SN/L;
        if(Lcnt>0) Lcnt--;
        sans += Lcnt*Lcost;
        SN -= L*Lcnt;

        ll SLcnt = SN/SL;
        if(SLcnt>0) SL--;
        sans += SLcnt*SLcost;
        SN -= SL*SLcnt;

        ans = max(ans, sans+dp[SN]);
    }

    cout << ans << endl;
}