#include<stdio.h>
int main(){
    int n;
    int arr[100];
    if (scanf("%d", &n) != 1) {
        printf("Invalid input");
        return 0;
    }
    for (int i = 0; i < n; i++) {
        if (scanf("%d",arr[i]) ! = 1) {
        printf("Invalid input");
        return 0;   
        }
    }
    for (int i = n - 1; i >=0; i--) {
        printf("%d",arr[i]);
    }
    return 0;
}