#include<iostream>
#include<cstdio>
#include<string>
#include<algorithm>
#include<sstream>
using namespace std;

string str;

signed main()
{
    cin>>str;

    reverse(str.begin(), str.end());
    if(str.back()=='-')
    {
        cout<<"-";
        str.pop_back();
    }

    int res;
    stringstream ss;
    ss<<str, ss>>res, ss.clear();//将翻转后的字符串转化为数字，无需考虑前导0
    cout<<res<<endl;
}