x=int(input()) y=int(input()) z=int(input()) n=int(input()) m=int(input()) C=0 for a in range (0,m+1): for b in range (0,m+1): c=m-a-b if c%z==0 and c>=0: if ax+by+c//z==n and a+b+c==m: C+=1 print(C)