#include <cmath>
#include <cstdio>
 
using namespace std;
 
long long i,n,j,s,sol,x[4],y[4],s2,l,r,x3,x4,x1,x2;
inline long long min(long long aux1,long long aux2){if (aux1<aux2) return aux1;else return aux2;}
inline long long max(long long aux1,long long aux2){if (aux1>aux2) return aux1;else return aux2;}
 
int main()
{
    freopen("plus.in","r",stdin);
    freopen("plus.out","w",stdout);
    scanf("%lld",&n);
    for(i=1;i<=3;++i)
        scanf("%lld%lld",&x[i],&y[i]);
    for(i=0;i<=x[1];++i)
    {
        s=n-y[1]*i;
        if (y[2]!=0)
        {
            if (y[3]!=0)
            {
                x1=(s-0*y[2])*y[3];
                x2=(s-x[2]*y[2])*y[3];
                l=min(x1,x2);
                r=max(x1, x2);
                l=max(l,(long long)0);
                r = min(r,x[3]);
                if (l<=r)
                    sol+=(r-l+1);
            }
            else
            {
                x3=s*y[2];
                if (0<=x3&&x3<=x[2])
                    sol+=(x[3]+1);
            }
        }
        else
        {
            if (y[3]==0)
            {
                if (s==0)
                    sol+=(x[2]+1)*(x[3]+1);
            }
            else
            {
                x4=s/y[3];
                if (x4>=0&&x4<=x[3])
                    sol+=x[2]+1;
            }
        }
    }
    printf("%lld",sol);
    return 0;
}