L=int(input())
M=int(input())
N=int(input())

sum=100*L+25*M+N
cnt1000=0
cnt100=0
cnt25=0
cnt1=0
if sum>=1000:
    cnt1000+=sum//1000
    sum=sum-1000*cnt1000
if sum>=100:
    cnt100+=sum//100
    sum=sum-100*cnt100
if sum>=25:
    cnt25+=sum//25
    sum=sum-25*cnt25
cnt1+=sum

print(cnt1000+cnt100+cnt25+cnt1)