#include<stdlib.h>
#include<stdio.h>
int main(){
int t,num,newnum = 0;
scanf("%d",&num);
while(num > 0){
t = num % 10; //暫存要往前推的數
num /= 10; //削掉已經往前推的數
newnum = newnum * 10 + t;
}
printf("%d", newnum);
return 0;