#include<stdio.h>
int main()
{
    int N;
    int found=0;
    scanf("%d",&N);
    if(N<1)
    {
        printf("Invalid input");
        return 0;
    }
    int arr[N];
    for(int i=0;i<N;i++)
    {
        scanf("%d",&arr[i]);
    }
    for(int i=0;i<N;i++)
    for(int j=i+1;j<N;j++)
    {
        if(arr[i]==arr[j])
        {
            printf("%d",arr[i]);
            found1;
            break;
    }
    }
}
if (found){
    printf("No dupicates found");
}