####準備
[C#でAtCoderデビューのための準備]
(https://qiita.com/azumabashi/items/7aa9e4b77c10970cc30a)
のあとで AtCoder Beginners Selection　をやってみました。

####問題文
ABC085C - Otoshidama
[https://atcoder.jp/contests/abs/tasks/abc085_c]
(https://atcoder.jp/contests/abs/tasks/abc085_c)

####提出結果

using System;
using System.Linq;

class Program
{
    static void Main(string[] args)
    {
        long[] array = Console.ReadLine().Split().Select(long.Parse).ToArray();
        long N = array[0];
        long Y = array[1] / 1000;

        long x = -1;
        long y = -1;
        long z = -1;
        bool ari = false;
        for (long ix = N; ix >= 0; ix--)
        {
            for (long iy = N - ix; iy >= 0; iy--)
            {
                long iz = N - ix - iy;
                if ((10 * ix) + (5 * iy) + iz == Y)
                {
                    x = ix;
                    y = iy;
                    z = iz;
                    ari = true;
                    break;
                }
            }
            if (ari) break;
        }
        Console.WriteLine($"{x} {y} {z}");
    }
}

####テスト実行