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 a*x+b*y+c//z==n and a+b+c==m:
                C+=1
print(C)