UserControl_Need.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace N_Puzzle_Game
{
    public class UserControl_Need : UserControl
    {
        public Timer t;
        public List<string> rand_states = new List<string>();
        public int btn_length = 0, w_length = 0, N = 0;

        public int x { set; get; }
        public int y { set; get; }

        public void load()
        {
            string path = @"Files\input4_4.in";
            var lines = File.ReadLines(path);
            foreach (var line in lines)
                rand_states.Add(line.ToString());
        }

        public string state { set; get; }

        public string suffle(string p)
        {
            Random rand = new Random();
            char[] state = p.ToCharArray();
            for (int i = 0; i < p.Length - 1; i++)
            {
                int x = rand.Next(i + 1, p.Length);
                char c = state[i];
                state[i] = state[x];
                state[x] = c;
            }
            return new string(state);
        }

        public bool is_solvable(string state)
        {
            int ans = 0;
            for (int i = 0; i < state.Length - 1; i++)
                for (int j = i + 1; j < state.Length; j++)
                    if (state[j] > state[i] && state[i] != 48)
                        ans += 1;
            return (ans % 2 == 0);
        }

        public string get_state(int size)
        {
            string ans = "";
            for (char i = '0'; i < '0' + size; i++)
                ans += i;
            return suffle(ans);
        }

        public void start()
        {
            t.Start();
        }

        public string random_state()
        {
            Random rand = new Random();
            return rand_states[rand.Next(0, rand_states.Count)];
        }
    }
}