#include <stdio.h>
int reverse(int n);
int main() {
int n;
scanf("%d", &n);
printf("%d\n", reverse(n));
return 0;
}
int reverse(int number)
{
int symbol=1,x,sum=0;
if(number<0){
number=-number;
symbol=-1;
}
while(number>0){
x = number%10;
sum = sum * 10 +x;
number/=10;
}
sum*=symbol;
return sum;
}