#include<bits/stdc++.h>
using namespace std;
int main(){
    int n;
    cin>>n;
    if(n==0){
    	cout<<0<<endl;
	}else{
		cout<<abs(n)<<endl;
	}
}
/**************************************************************
	Problem: 1348
	User: admin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/