Reverse Array.java

import java.io.*;
import java.util.*;

public class Main{
  public static void display(int[] a){
    StringBuilder sb = new StringBuilder();

    for(int val: a){
      sb.append(val + " ");
    }
    System.out.println(sb);
  }

  public static void reverse(int[] arr){
    // write your code here
    int left = 0, right = arr.length - 1;
    while(left < right)
    {
        int temp = arr[left];
        arr[left] = arr[right];
        arr[right] = temp;
        
        left++; right--;
    }
  }

public static void main(String[] args) throws Exception {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

    int n = Integer.parseInt(br.readLine());
    int[] a = new int[n];
    for(int i = 0; i < n; i++){
       a[i] = Integer.parseInt(br.readLine());
    }

    reverse(a);
    display(a);
 }

}