#include <stdio.h>
int main(){
    int n;
    scanf("%d",&n);
    int arr[n];
    for (int i=0;i<=n;i++){
        scanf("%d",&arr[i]);
        
    }
    if (n<0){
        printf("-1");
        
    }
    //printing array elements in reverse order
    for (int i=-1;i<=n;i--){
        printf("%d",arr[i]);
        
    }
    
}