ABC087 B - Coins

提出

code: python

a = int(input())

b = int(input())

c = int(input())

x = int(input())

ans = 0

for i in range(a+1):

for j in range(b+1):

for k in range(c+1):

if (500 * i + 100 * j + 50 * k == x):

ans += 1

print(ans)