游戏room8 第六关的答案

可以采用程序枚举的方式穷举：

首先判断==24的只有两种可能，

在判断==136的只有1中可能

在判断==73的时候剔除掉 24,136入围的答案

依次类推....

答案：

//key:25611 list:[2, 5, 6, 11]===>24

//key:8182324 list:[8, 18, 23, 24]==>73
/key:17354143 list:[17, 35, 41, 43]===>136
//key:9193031 list:[9, 19, 30, 31]==>89

     Java Code  
  

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package org.master.common;

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class TestAdd
{

     public static void main( String[] args)
    {
        Integer[] arr = { 11, 2, 5, 6, 17, 18, 30, 8, 19, 35, 31, 43, 41, 24, 9, 23 };

        Map< String, List<Integer>> map = new HashMap<>();

         for ( int i = 0; i < arr.length; i++)
        {
            List<Integer> list = new ArrayList<>();
            Integer a = arr[i];
             for ( int j = 0; j < arr.length; j++)
            {
                 if (j == i)
                {
                     continue;
                }
                Integer b = arr[j];

                 for ( int m = 0; m < arr.length; m++)
                {
                     if (m == i || m == j)
                    {
                         continue;
                    }
                    Integer c = arr[m];

                     for ( int n = 0; n < arr.length; n++)
                    {
                         if (n == i || n == j || n == m)
                        {
                             continue;
                        }
                        Integer d = arr[n];

                        Integer sum = a + b + c + d;
                         //key:2589 list:[2, 5, 8, 9]
                         // {
                         // key:6181930 list:[6, 18, 19, 30]
                         // key:6171931 list:[6, 17, 19, 31]
                         // }
                         //key:25611 list:[2, 5, 6, 11]===>24
                         // {
                         // key:8182324 list:[8, 18, 23, 24]
                         // key:8171830 list:[8, 17, 18, 30]
                         // key:9172324 list:[9, 17, 23, 24]
                         // }

                         //key:8182324 list:[8, 18, 23, 24]==>73
                         //key:17354143 list:[17, 35, 41, 43]===>136
                         //key:9193031 list:[9, 19, 30, 31]==>89
                         boolean flag = valide( new Integer[] { 2, 5, 6, 11, 17, 35, 41, 43, 8, 18, 23, 24}, a, b, c, d);
                         if(!flag)
                        {
                             continue;
                        }

                         //修改这个值--使用程序去完成计算【24,73,136,89】
                         if (sum == 89)
                        {
                            list.add(a);
                            list.add(b);
                            list.add(c);
                            list.add(d);
                            Collections.sort(list);
                             String key = getKey(list);
                            map.put(key, list);
                            list = new ArrayList<>();
                        }
                    }

                }

            }
        }

         for ( String key : map.keySet())
        {
            System.out.println( "key:" + key + " list:" + map.get(key));
        }
    }

     private static boolean valide(Integer[] arrays, Integer a, Integer b, Integer c, Integer d)
    {
         for( int i = 0; i < arrays.length; i++)
        {
             if(a == arrays[i] || b == arrays[i] || c == arrays[i] || d == arrays[i])
            {
                 return false;
            }
        }
         return true;
    }

     private static String getKey(List<Integer> list)
    {
        StringBuffer sb = new StringBuffer();
         for ( int i = 0; i < list.size(); i++)
        {
            sb.append(list.get(i));
        }
         return sb.toString();
    }

}

游戏room8 第六关的答案

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