#!/usr/bin/python
# -*- coding: utf-8 -*-

c100 = int(raw_input())
c25 = int(raw_input())
c1 = int(raw_input())
list = [ 1000 , 100 , 25 , 1]
sum = c100 * 100 + c25 * 25 + c1 * 1
sum2 = sum

ans = 0
for i in list:
       	tmp = sum // i
       	ans += tmp
       	sum -= tmp * i
print ans - ( sum2 // 1000 )