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