#include <stdio.h>
int main(){
    int n;
    printf("Enter the elements:");
    scanf("%d",&n);
    int arr[n];
    printf("Enter %d elements:\n",n);
    for(int i = 0; i < n; i++){
        scanf("%d",&arr[i]);
    }
    if found=0;
    printf("Duplicate element are:");
    for(int i=0;i<n;i++){
        for(int j=1+1;j<n;j++){
            if(arr[i]==arr[j]){
                int alreadyprinyed=0;
                for(int k=0;k<i;k++){
                    if(arr[k]==rr[i]){
                        already printed=1;
                        break;
                    }
                }
                if(! alreadyprinted){
                    printf("%d",arr[i]);
                    found=1;
                }
                break;
            }
        }
        if(!found)
        printf("none");
    
    return 0;
}