//C
#include <stdio.h>
#define N 9
int arr[N];
int rev(int p){
    int res= 0,pow = 1;
    int i = 0,j = 0, n = p> 0 ? p:-p;
    while(n % 10 == 0) n /= 10;
    while(n > 0){
        arr[i++] = n%10;
        n /= 10;
    }
    while(i-- >= 0){
        res = res + arr[i]*pow;
        pow *= 10;
    }
    res = p > 0? res : -res;
    return res;
}
int main(){
    int num;
    scanf("%d",&num);
    printf("%d",rev(num));
    return 0;
}