import java.util.Random;

public class Test
{
    public static void main(String[] args)
    {
        // 1. 百元买百鸡
        // 5X + 3Y + Z/3 = 100;
        // X + Y + Z = 100; ->
        // 15X + 9Y + (100 - X - Y) = 300; ->
        // 14X + 8Y = 200; ->
        // 7X + 4Y = 100;
        for (int i = 0; i < 100 / 4; i++)
        {
            if ((100 - i * 4) % 7 == 0)
            {
                int x = (100 - i * 4) / 7;
                int y = i;
                int z = 100 - x - y;
                System.out.println(x + ":" + y + ":" + z);
            }
        }

        // 2.彩票
        int[] caipiao = new int[7];
        for (int i = 0; i < 7; i++)
        {
            caipiao[i] = -1;
        }

        for (int i = 0; i < 6; i++)
        {
            int ran = new Random().nextInt(33) + 1;
            while (haveSame(caipiao, ran))
            {
                ran = new Random().nextInt(33) + 1;
            }
            caipiao[i] = ran;
        }

        caipiao[6] = new Random().nextInt(16) + 1;
        // 打印
        for (int i : caipiao)
        {
            System.out.println(i);
        }
    }


    public static boolean haveSame(int[] caipiao, int ran)
    {
        for (int i = 0; i < 6; i++)
        {
            if (caipiao[i] == ran)
            {
                return true;
            }
        }

        return false;
    }
}

------解决方案--------------------
Java code

    // 题目4
    public static void main(String args[])
    {
        int m = 0;
        int s = 0;
        int i = 0;
        int a[] = new int[1000];

        for (s = 2; s < 1000; s++)
        {
            m = 0;
            for (i = 1; i < s; i++)
            {
                if (s % i == 0)
                    a[i - 1] = i;
                else
                    a[i - 1] = 0;
            }
            for (i = 1; i < s; i++)
                m = m + a[i - 1];
            if (m == s)
                System.out.println(s);
        }
    }

------解决方案--------------------

import java.util.Random;

public class Test
{
   public static void main(String[] args)
   {
       // 1. 百元买百鸡
       // 5X + 3Y + Z/3 = 100;
       // X + Y + Z = 100; ->
       // 15X + 9Y + (100 - X - Y) = 300; ->
       // 14X + 8Y = 200; ->
       // 7X + 4Y = 100;
       for (int i = 0; i < 100 / 4; i++)
       {
           if ((100 - i * 4) % 7 == 0)
           {
               int x = (100 - i * 4) / 7;