#include<stdio.h> 
int main()
{
    int arr[] = {1, 2, 2, 4, 5, 5, 5}; 

 int n = sizeof(arr) / sizeof(arr[0]); 

 for (int i = 0; i < n; i++) { 

 for (int j = i + 1; j < n; j++) { 

 if (arr[i] == arr[j]) { 

 printf("Duplicate element: %d\n", arr[i]); 

 } 

 } 

 } 

 return 0; 

}