NSTEPS.cpp

#include <iostream>
using namespace std; 

int CheckValid(int x, int y)
{
	if (x >= y && x - y <= 2)
	{
		if (x%2 == 0 && y%2 == 0) return x + y;
		if (x%2 == 1 && y%2 == 1) return x + y -1;
	}
	return -1;
}

int main()
{
	//freopen("input.txt","r", stdin);
	int N, x, y;
	cin >> N;
	for(int tc = 0; tc < N; tc++)
	{
		cin >> x >> y;
		int ch = CheckValid(x,y);

		if ( ch == -1) cout << "No Number" << endl;
		else cout << ch << endl;
	}
	return 0;
}