L = int(raw_input())
M = int(raw_input())
N = int(raw_input())

N1, N2 = N // 25, N % 25
M1, M2 = (M + N1) // 4, (M + N1) % 4
L1, L2 = (L + M1) // 10, (L + M1) % 10

print L2 + M2 + N2