text: #include<bits/stdc++.h>
  
  using namespace std;
  
  int main(){
  	ios_base::sync_with_stdio(false);
  	cin.tie(NULL);
  	int x;
  	cin>>x;
  	if(x==0) cout<<"nulo\n";
  	else if(x>0) cout<<"positivo\n";
  	else cout<<"negativo\n";
  	return 0;
  }
  