m100=int(input())
m25=int(input())
m1=int(input())

if m1>=25:
    kuriage1=int(m1/25)
    m25+=kiriage1
    m1=int(m1%25)

if m25>=4:
    kuriage25=int(m25/4)
    m100+=kuriage25
    m25=int(m25%4)

if m100>=10:
    m1000=0
    kuriage100=int(m100/10)
    m1000+=kuriage100
    m100=int(m100%10)

print(m1+m25+m100)