"use strict";
function Main(input) {
    function ans_coin(amount, CoinSize) {
        const Nmb = Math.floor(amount / CoinSize);
        const AmsAmount = amount - Nmb * CoinSize;
        return [AmsAmount, Nmb];
    }
    let Coin100;
    let Coin25;
    let Coin1;
    [Coin100, Coin25, Coin1] = input.split("\n").map(i => Number(i));
    const amount = Coin100 * 100 + Coin25 * 25 + Coin1;
    const [Surplus1000, Nmb1000] = ans_coin(amount, 1000);
    const [Surplus100, Nmb100] = ans_coin(Surplus1000, 100);
    const [Surplus25, Nmb25] = ans_coin(Surplus100, 25);
    console.log(Nmb100 + Nmb25 + Surplus25);
}
//テストの入力を受け取る
Main(require("fs").readFileSync("/dev/stdin", "utf8"));
//Main("7\n20\n10");
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