import math
x = 3
l,m,n = map(int,[input() for i in range(x)])


def change(l,m,n):
    re_n = math.floor(n/25)
    m += re_n
    n -= re_n * 25
    re_m = math.floor(m/4)
    l += re_m
    m -= re_m * 4
    re_l = math.floor(l/10)
    l -= re_l * 10
    return n+m+l

print(int(change(l,m,n)),end='\n')