1 import java.util.HashSet;
 2 import java.util.Random;
 3 import java.util.ArrayList;
 4 import java.util.Arrays;
 5 import java.util.Scanner;
 6 
 7 
 8 public class siziyunsuan {
 9 
10 
11     public static void main(String[] args) {
12         Random random = new Random();
13 
14         //定制数量
15         int x;
16         System.out.println("输入制定个数");
17         Scanner sc = new Scanner(System.in);
18         x = sc.nextInt();
19 
20         //打印多少
21         int ans;
22         System.out.println("请输入想打印多少");
23         ans = sc.nextInt();
24 
25         //最大值
26         int len;
27         System.out.println("请输入最大值范围");
28         len = sc.nextInt();
29         int random1;
30 
31         int j = 0;
32 
33         //System.out.println(chark);
34         while (j <= ans) {
35             int houhou = 0;
36             for (int i = 0; i < (2 * x )- 1; i++) {
37                 int p = random.nextInt(2*x-1);
38                 if(i%2==0&&p==i&&p!=2*x-2)
39                 {
40                     houhou++;
41                     System.out.print("(");
42                 }
43 
44                 if (i % 2 == 0) {
45                     System.out.print(random.nextInt(len) + 1);
46 
47                 }
48                 else {
49                     switch (random.nextInt(4)) {
50                         case 0:
51                             System.out.print("+");
52                             break;
53                         case 1:
54                             System.out.print("-");
55                             break;
56                         case 2:
57                             System.out.print("*");
58                             break;
59                         case 3:
60                             System.out.print("/");
61                             break;
62                     }
63                 }
64 
65 
66 
67             }
68             if(houhou == 1)
69             System.out.print(")");
70             j++;
71             System.out.println();
72 
73         }
74 
75 
76     }
77 }