# -*- coding: utf-8 -*-
__author__ = 'yuuki'
#No.32 貯金箱の憂鬱

#bill
bill = 0

#coin
L = input()
M = input()
N = input()

if N / 25 > 0:
    M = M + (N/25)
    N = N % 25

if M / 4 > 0:
    L = L + (M/4)
    M = M % 4

if L / 10 > 0:
    bill = bill + (L/10)
    L = L % 10

print L + M + N