#include<stdio.h>
#define min(a,b) ((a)<(b)?(a):(b))

unsigned long long int nr,n1,n2,n3,i,j,k,n,l,sum;
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 %d",&n,&x);
if(x==1)
	n1+=n;
else
if(x==0)
	n2+=n;
else
	n3+=n;
}
if(sum>n1){printf("%d",0);return 0;}
else
if(sum==n1){nr=1+n2;}
else
{nr=1+n2;
if(!n2)
nr+=min(n3,n1-sum);
else
nr+=min(n3,n1-sum)*n2;}
printf("%lld",nr);
return 0;}