#include <stdio.h>

long long a[3];

int main()
{
	freopen("plus.in","r",stdin);
	freopen("plus.out","w",stdout);

	long long n,x,y,i;

	scanf("%lld ",&n);

	for (i=1;i<=3;i++)
	{
		scanf("%lld %lld",&x,&y);
		a[y+1]+=x;
	}

	long long sol=0;
	for (i=0;i<=a[0];i++)
		if ( (i+n<=a[2])&&(i+n>=0) ) sol++;
	sol=sol*(++a[1]);
	printf("%lld",sol);
	return 0;
}