#include<cmath> #include<cstdio> #include<algorithm> int n,a,b,c,ans=2100000000,x,i; int main() { scanf("%d",&n); for (;i<3;i++) { scanf("%d%d",&a,&b); x=std::ceil(n*1.0/a)*b; ans=std::min(x,ans); } printf("%d\n",ans); return 0; } #in...