#include<stdio.h>
int s,contor=0,nrbile1,nr1,nrbile2,nr2,nrbile3,nr3,i,j,k,t;
FILE *f,*g;
int main() {
f=fopen("plus.in","r");
fscanf(f,"%d%d%d%d%d%d%d",&s,&nrbile1,&nr1,&nrbile2,&nr2,&nrbile3,&nr3);
fclose(f);
for(i=0;i<=nrbile1;i++)
	for(j=0;j<=nrbile2;j++)
		for(k=0;k<=nrbile3;k++){t=0;
					t=i*nr1+j*nr2+k*nr3;
					if(t==s) contor++; }
g=fopen("plus.out","w");
fprintf(g,"%d\n",contor);
fclose(g);
return 0; }