#include <iostream>
using namespace std;
int main()
{
    int x = 0;
    int y = 0;
    int z = 0;
    int n = 0;
    int m = 0;
    int s = 0;
    cin>>x>>y>>z>>n>>m;
    for (int i = 0;i<=m;i++)
    {
        for (int j = 0;j<=m;j++)
        {
            if ((i*x+j*y+(m-i-j)/z == n)&&((m-i-j)%z == 0))
            {
                s++;
            }
        }
    }
    cout<<s;
}