#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	cin>>s;
	if(s=="0"){
		cout<<0;
		return 0;
	}
	int n=s.size();
	string s1;
	int cnt=0;
	if(s[0]=='-') s1+='-';
	for(int j=n-1;j>=0;j--){
		if(s[j]=='-') continue;
		if(cnt==0 && s[j]=='0') continue;
		else{
			s1+=s[j];
			cnt++;
		}
	}
	cout<<s1;
    return 0;
}