#include<stdio.h>
#include<stdlib.h>
int main(){
    int n = 0;
    scanf("%d", &n);
    int result = 0;
    if(n < 0){
        n = -n; 
        printf("-");
    }

    while(1)
        {
        result = n % 10; 
        printf("%d", result);        
        n = n / 10;
        if(n == 0)
        {
            break;                
        } 
    }
}