P1307

#include<bits/stdc++.h>
using namespace std;
string s;
int main()
{
	cin>>s;
	int k=0;
	if(s[0]=='-')
	cout<<s[0],k++;
	for(int i=s.length()-1;i>=k;i--)
	{
		if(s[i]!='0') cout<<s[i];
		if(s[i]=='0'&&i!=s.length()-1) cout<<0;
	}
	if(s[0]=='0'&&s.length()==1) cout<<0;
	return 0;
}