x,y,z,n,m=map(int,input().split()) c=0 for i in range(0,int(n/x)+1,1): for j in range(0,int(n/y)+1,1): for k in range(0,m+1,z): if i+j+k==m and x*i+y*j+1/z*k==n: c+=1 print(c)