import std.stdio;
import std.conv, std.array, std.algorithm, std.string;
import std.math, std.random, std.range, std.datetime;
import std.bigint;

void main(){
	long[] tmp = readln.chomp.split.map!(to!long).array;
	long a = tmp[0], b = tmp[1];
	
	string ans;
	if(b < 0){
		if((a - b) % 2) ans = "Positive"; // eg -4 .. -1
		else ans = "Negative"; // eg -3 .. -1
		}
	else if(a <= 0) ans = "Zero";
	else ans = "Positive";
	
	ans.writeln;
	}