open System

let sum = (Console.ReadLine() |> (fun s -> 100 * (int s)))
        + (Console.ReadLine() |> (fun s ->  25 * (int s)))
        + (Console.ReadLine() |> int)

let hundred = (sum % 1000) / 100
let quarter = (sum / 100) / 25
let one     = (sum % 25)

Console.WriteLine (hundred + quarter + one)