#include<stdio.h>
#include<ctype.h>
int main(){
    int n;
    int arr[5];
    scanf("%d",&n);
    
    if(isdigit(n)|n<=0){
        printf("Invalid input");
        return 0;
    }
    int head = 0;
    for(int i=0;i<n;i++)
    scanf("%d",&arr[i]);
    head = arr[i];
    printf("%d",head);
}