import math

L, M, N = [ int(input()) for i in range(3) ]

def exchange(m,n):
    inc = math.floor(m / n)
    remain = m % n
    return inc, remain

if N >= 25:
    inc, N = exchange(N,25)
    M += inc
if M >= 4:
    inc, M = exchange(M,4)
    L += inc
if L >= 10:
    inc, L = exchange(L,10)

print(L + M + N)