Question

Finding duplicate values of an array of integer values.

Example 1

Input: arr[] = {5, 2, 7, 7, 5}, N = 5

Output:

Duplicate Element: 5

Duplicate Element: 7

Example 2

Input: arr[] = {1, 2, 5, 5, 6, 6, 7, 2}, N = 8

Output:

Duplicate Element: 2

Duplicate Element: 5

Duplicate Element: 6

CODE::

class Main {
  
public static void FindDuplicate(int[] arr){
// write your code to find duplicates here and print those values
  
}
  
public static void main(String[] args) {
// take array size as input from keyboard here
  
  
// take the array elements as input from keyboard here
  
  
}
}

Answer 1

import java.util.Scanner;

class Main {

    public static void FindDuplicate(int[] arr){
        int count;
        for(int i = 0;i<arr.length;i++){
            count=0;
            for(int j = 0;j<i;j++){
                if(arr[i]==arr[j]){
                    count++;
                }
            }
            if(count==0) {
                count = 0;
                for (int j = i+1; j < arr.length; j++) {
                    if (arr[i] == arr[j]) {
                        count++;
                    }
                }
                if(count==1){
                    System.out.println("Duplicate Element: "+arr[i]);
                }
            }
        }

    }

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        // take array size as input from keyboard here
        int size = scan.nextInt();

        int arr[] = new int[size];

        // take the array elements as input from keyboard here
        for(int i = 0;i<size;i++){
            arr[i] = scan.nextInt();
        }

        FindDuplicate(arr);
    }
}