#include<stdio.h>


long long int nr,n1,n2,n0,i,j,k,n,l,sum;
long long int x;

int main(){
freopen("plus.in","r",stdin);
freopen("plus.out","w",stdout);
scanf("%lld",&sum);
for(i=1;i<=3;i++){
scanf("%lld %lld",&n,&x);
if(x==1)
	n1=n1+n;
else
if(x==0)
	n0=n0+n;
else
if(x==-1)
	n2=n2+n;
}

if(sum>n1)nr=0;
else
if(sum==n1)nr=1+n0;
else
{nr=1+n0;
if(n1-sum>n2)nr=(n1-sum)*(n0+1);
else
	nr=n2*(n0+1);
}
printf("%lld\n",nr);
return 0;}