计蒜客 挑战难题 移除数组中的重复元素

 1 import java.util.ArrayList;
 2 import java.util.List;
 3 import java.util.Scanner;
 4 
 5 public class Main 
 6 {  
 7 public static void main(String[] args)
 8     {
 9         Scanner input = new Scanner(System.in);
10         int n = input.nextInt();
11         List<Integer>list = new ArrayList<Integer>();
12         for(int i=0;i<n;i++)
13         {
14             list.add(input.nextInt());
15         }
16         System.out.println(run(n,list));
17     }
18     public static int run(int n,List list)
19     {
20         for(int i=0;i<list.size();i++)
21         {
22             for(int j=0;j<i;j++)
23             {
24                 if(list.get(i)==list.get(j))
25                 {
26                     list.remove(i);
27                     i--;
28                 }
29             }
30         }
31         return list.size();
32     }
33 }

 1 import java.util.Scanner;
 2 
 3 public class Main 
 4 {  
 5     public static void main(String[] args)
 6     {
 7         Scanner input = new Scanner(System.in);
 8         int n = input.nextInt();
 9         int [] a = new int[n];
10         for(int i=0;i<n;i++)
11         {
12             a[i]=input.nextInt();
13         }
14         System.out.println(run(n,a));
15     }
16     public static int run(int n,int []a)
17     {
18         for (int i = 0; i < a.length-1; i++) 
19         {
20             if (a[i] == a[i + 1]) 
21             {
22                 n--;
23             }
24         }
25         return n;
26     }
27 }