#include <stdio.h>
int main(){
    int n;
    scanf("%d",&n);
    int arr[n];
    for (int i=0;i<n;i++){
        scanf("%d ",&arr[i]);
        
    }
    int id[n];
    id[]=arr[n];
    for (int i=0;i<n;i++){
        if (arr[i]==id[i]){
            printf("%d",arr[i]);
        }
    }
    
        
        
        
    
}