let L = int <| stdin.ReadLine()
    let M = int <| stdin.ReadLine()
    let N = int <| stdin.ReadLine()
    let money =
        Seq.zip [100;25;1;] [L;M;N]
        |> Seq.map (fun (a,b) -> a*b)
        |> Seq.reduce ((+))
    let coins = [1000;100;25;1;]
    let rec f l m p =
        let a,b = m/coins.[p],m%coins.[p]
        if m - a*coins.[p] = 0 then l@[a]
        else f (l@[a]) (m-a*coins.[p]) (p+1)
    match f [] money 0 with
    | [] | [_] -> 0
    | l -> l |> Seq.skip 1 |> Seq.reduce((+))
    |> printfn "%d"