C100 = int(input())
C25 = int(input())
C1 = int(input())
N1000 = 0

while 1:
    if C1 >=25:
        C25 += 1
        C1 -= 25
        
    elif C25>=4:
        C100 += 1
        C25 -= 4
        
    elif C100>=10:
        N1000 += 1
        C100 -= 10
    elif C100<10 and C25<4 and C1<25:
        break

print(C1+C25+C100)