#include<stdio.h>

int main(){
    
    int N;
    int arr[10];
    
    scanf("%d", &N);
    
    if(N < 0){
        printf("Invalid Input");
        return 0;
    }
    
    for(int i = 0; i < N; i++){
        scanf("%d", &arr[i]);
    if(arr[i] < 0){
        printf("Invalid Input");
        return 0;
      }
    }
    
    for (int i = 0; i < N; i++){
        printf("%d", arr[i]);
    }
    print("\n");
    
    int start = 0, end = N-1;
    whlie(start < end){
        int temp = arr[start];
        arr[start] = arr[end];
        arr[end] = temp;
        start ++;
        end --;
    }
    
    return 0;
}