#include<stdio.h>
#define MAX 1000
int main()
{
    int n,i;
    int queue[MAX];
    scanf("%d",&n);
    for(i=0;1<n,i++)
    {
        scanf("%d",&queue[i]);
    }
    for(i=0;i<n,i++)
    {
        printf("%d",queue[i]);
    }
    return 0;
}