A = int(input())
B = int(input())
C = int(input())

if C >= 25:
    D = C//25
    B += D
    C = C-D*25
if B >= 4:
    E = B//4
    A += E
    B = B-E*4
if A >= 10:
    F = A//10
    A = A-F*10
G = A + B + C
print(G)