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  1. import java.util.*;
  2. class BeingZero {
  3.     public static boolean isPalindrome(int arr[])
  4.     {
  5.         //arr[]={1 2 3 4 5}
  6.         int i = 0;
  7.         int j = arr.length - 1;
  8.         while(i<=j)
  9.         {
  10.             if(arr[i]!=arr[j])
  11.             {
  12.                 return false;
  13.             }
  14.             i++;
  15.             j--;
  16.         }
  17.         return true;
  18.     }
  19.     public static List<Integer> reverseList(List<Integer> list)
  20.     {
  21.         //Collections.reverse(list);
  22.         // int a = 10;
  23.         // int b = 5;
  24.         // int temp = a;
  25.         // a = b;
  26.         // b = temp;
  27.  
  28.         int i = 0;
  29.         int j = list.size()-1;
  30.         while(i<j)
  31.         {
  32.             int temp = list.get(i);
  33.             list.set(i,list.get(j));
  34.             list.set(j,temp);
  35.             i++;
  36.             j--;
  37.         }
  38.         return list;
  39.     }
  40.     public static void main(String[] args) {
  41.         Scanner sc = new Scanner(System.in);
  42.         long n = sc.nextLong();
  43.         int arr[] = new int[(int)n];
  44.         //Reading array elements
  45.         for(int i=0;i<n;i++)
  46.         {
  47.             arr[i]= sc.nextInt();
  48.         }
  49.         //Print from 0 to n
  50.         for(int ele : arr)
  51.         {
  52.             System.out.print(ele +" ");
  53.         }
  54.         System.out.println();
  55.  
  56.         //Print from n to 0
  57.         int N = (int)n;
  58.         for(int i = N-1;i>=0;i--)
  59.         {
  60.             System.out.print(arr[i]+" ");
  61.         }
  62.         System.out.println();
  63.         //Print even index elements
  64.         for(int i = 0;i<N;i=i+2) {
  65.             System.out.print(arr[i]+" ");
  66.         }
  67.         System.out.println();
  68.         List<Integer> list = new ArrayList<>();
  69.         //Copy from array to list
  70.         for(int ele : arr)
  71.         {
  72.             list.add(ele);
  73.         }
  74.         //Sum of the list elements
  75.         int sum = 0;
  76.         for(int i = list.size()-1;i>=0;i--)
  77.         {
  78.             sum = sum+list.get(i);
  79.         }
  80.         System.out.println("Checking Palindrome : " + isPalindrome(arr));
  81.         //Reverse the list
  82.         List<Integer> rl = reverseList(list);
  83.         System.out.println(rl);
  84.     }
  85.  
  86. }
  87.  
  88.  
  89.  
  90.  
  91.  
Success #stdin #stdout 0.18s 60876KB
comments (?)
stdin
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5
1 2 3 4 5
stdout
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1 2 3 4 5 
5 4 3 2 1 
1 3 5 
Checking Palindrome : false
[5, 4, 3, 2, 1]
https://ideone.com/4Q85Ad
language:
Java (HotSpot 12)
created:
1 day ago
visibility:
public

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