L = int(input())
M = int(input())
N = int(input())

s = 0
value = [1000, 100, 25, 1]
money = 100 * L + 25 * M + N

for i in range(4):
	if i>= 1:
		s = s + money // value[i]
	money = money % value[i]
	
print(s)