#include <stdio.h>
#include <stdlib.h>
int function(char a[],int n,int number);
int main () {
long long integer,integer1;
int n=0;
scanf("%lld",integer);
integer1=integer;
while(integer1!=0){
integer1%=10;
n++;
}
char a[] = (char*)malloc(n*sizeof(char));
printf("\n");
function(a,n,integer);
for(int i=n-1;i>=0;i++){
printf("%c",a[i]);
}
free(a);
return 0;
}
int function(char a[],int n,int number){
char b=number/=10;
number/=10;
n--;
a[n]=b;
if(n>0){
return function(a,n,number);
}
}