#include<stdio.h>
int main()
{
    int arr[100],top;

    int n,i;
    scanf("%d",&n);

    ///push
    for(i=0;i<n;++i){
        scanf("%d",&arr[i]);
        top=i;
    }
    top++;
    arr[top]=55;

    printf("%d\n",arr[top]);

    ///pop

    top--;
    printf("%d",arr[top]);


}