def solve():
    l=int(input())
    m=int(input())
    n=int(input())
    s=l*100+m*25
    s//=1000
    ans=0
    ans+=s//100
    s//=100
    ans+=m//25
    s//=25
    ans+=s
    print(ans)

if __name__=="__main__":
    solve()