#include<bits/stdc++.h> using namespace std; int n,ans,a[3]; int main(){ cin>>n; for(int i=1;i<=3;i++){ int x,y; cin>>x>>y; if(n%x==0){ ans=n/x*y; } else{ ans=n/x*y+y; } a[i]=ans; } int s,d,f; if(a[1]>a[2] && a[1]>a[3]){ ans=a[1]; } if(a[2]>a[1] && a[2]>a[3]){ ans=a[2]; } if(a[3]>a[1] && a[3]>a[2]){ ans=a[3]; } cout<<ans; return 0; }