Coin Change

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

class Program
{
    static int[] Ria(string line = null)
    {
        line ??= Console.ReadLine();
        if (string.IsNullOrWhiteSpace(line)) return Array.Empty<int>();
        return line.Trim().Split(new[] { ' ', ',', '\t' }, StringSplitOptions.RemoveEmptyEntries)
            .Select(int.Parse).ToArray();
    }
    static string[] Rsa()
    {
        int n = int.Parse(Console.ReadLine());
        var arr = new string[n];
        for (int i = 0; i < n; i++) arr[i] = Console.ReadLine();
        return arr;
    }
    static void W(params object[] parts) => Console.WriteLine(string.Join(" ", parts));
    static void Wb(bool v) => Console.WriteLine(v ? "true" : "false");
    static void Wi(int v) => Console.WriteLine(v);
    static void Ws(string v) => Console.WriteLine(v);

    static void Main()
    {
var coins = Ria();
int amount = int.Parse(Console.ReadLine());
int[] dp = new int[amount + 1];
Array.Fill(dp, amount + 1);
dp[0] = 0;
for (int a = 1; a <= amount; a++)
    foreach (var c in coins)
        if (c <= a) dp[a] = Math.Min(dp[a], dp[a - c] + 1);
Wi(dp[amount] > amount ? -1 : dp[amount]);
    }
}