迷你猜數

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

namespace 迷你猜數
{
    class Program
    {
        static void Main(string[] args)
        {
            List<int> LisData = GetData();
            
            LisData = FilterData(LisData, 4659, 0, 1);
            LisData = FilterData(LisData, 8763, 0, 1);
            LisData = FilterData(LisData, 1035, 0, 1);
            LisData = FilterData(LisData, 3249, 1, 1);
            LisData = FilterData(LisData, 0497, 0, 2);
            LisData = FilterData(LisData, 9148, 0, 2);
            foreach(var num in LisData)
            {
                Console.WriteLine(num);
            }
            Console.ReadKey();
        }

        /// <summary>
        /// 獲取所有可用數據
        /// </summary>
        /// <returns></returns>
        private static List<int> GetData()
        {
            List<int> LisData = new List<int>();
            for (int i = 0; i < 10; i++)
            {
                for (int j = 0; j < 10; j++)
                {
                    for (int k = 0; k < 10; k++)
                    {
                        for (int m = 0; m < 10; m++)
                        {
                            if ((i != j) && (i != k) && (i != m) && (j != k) && (j != m) && (k != m))
                            {
                                LisData.Add(i * 1000 + j * 100 + k * 10 + m);
                            }
                        }
                    }
                }
            }
            return LisData;
        }

        private static List<int> FilterData(List<int> LisData,int Num,int a,int b)
        {
            List<int> lisDataNum=new List<int>();
            int[] LisNum = new int[4];
            //將Num拆分成一個數組
            int[] Numnum = SplitNum(Num);
            foreach(var Data in LisData)
            {
                int aNum = 0;
                int bNum = 0;
                //將Data拆分成一個數組
                LisNum = SplitNum(Data);
                #region 求a，b的個數
                for (int i=0;i<4;i++)
                {
                    //求a的個數
                    if(Numnum[i]==LisNum[i])
                    {
                        aNum++;
                    }
                    //求b的個數
                    for(int j=0;j<4;j++)
                    {
                        if(Numnum[i]==LisNum[j])
                        {
                            bNum++;
                        }
                    }
                }
                bNum -= aNum;
                #endregion 求a,b的個數
                //判斷a,b
                if((aNum==a)&&(bNum==b))
                {
                    lisDataNum.Add(Data);
                }
            }
            return lisDataNum;
        }

        /// <summary>
        /// 拆分四位數
        /// </summary>
        /// <param name="Num"></param>
        /// <returns></returns>
        private static int[] SplitNum(int Num)
        {
            int[] Numnu = new int[4];
            for (int i = 0; i < 4; i++)
            {
                Numnu[i] = Num % 10;
                Num = Num / 10;
            }
            return Numnu;
        }
    }
}