import math

l = int(input()) #100円硬貨の枚数
m = int(input()) #25円硬貨の枚数
n = int(input()) #1円硬貨の枚数

change_n = math.floor((n * 1) / 25) 
result_n = n-((change_n * 25)/1)

m = m + change_n
change_m = math.floor((m * 25) / 100) 
result_m = m-((change_m * 100)/25)

l = l + change_m
change_l = math.floor((l * 100) / 1000)
result_l = l-((change_l * 1000)/100)

result = result_n + result_m + result_l

print (result)