#include <fstream.h>
ifstream q("plus.in");
ofstream w("plus.out");
int i,j,nr1,nr2,nr3,nrb1,nrb2,nrb3,ss,x3;
long long s,nr;
int main()
{q>>s>>nrb1>>nr1>>nrb2>>nr2>>nrb3>>nr3;
x3=nrb3*nr3;
for(i=0;i<=nrb1;++i)
  for(j=0;j<=nrb2;++j)
	{ss=i*nr1+j*nr2;
	if(nr3==-1)
	 {if(ss>=s&&ss+x3<=s)
       nr++;}
	 if(nr3==1)
	  {if(s==0||ss==0)
		nr+=nrb3+1;}
	   if(nr3==1)
		{if(ss<=s&&ss+x3>=s)
          nr++;}}	 
w<<nr;
return 0;}