k=0 #1000yen
l=int(input()) #100yen
m=int(input()) #25yen
n=int(input()) #1yen

sum = k*1000 + l*100 + m*25 + n

k=int(sum/1000)
l=int((sum-k*1000)/100)
m=int((sum-k*1000-l*100)/25)
n=sum%25

coin=l+m+n

print(coin)