nums = []
nums[0] = int(input())
nums[1] = int(input())
nums[2] = int(input())
money = nums[0]*100 + nums[1]*25 + nums[2]
cnt = 0

thous = money // 1000
if thous!= 0:
    #cnt += thous
    money -= 1000*thous
hands = money // 100
if hands!= 0:
    cnt += hands
    money -= 100*hands
twef = money // 25
if twef != 0:
    cnt += twef
    money -= 25*twef
cnt += money
print(cnt)