ACM (TJU) : 1233


#include <iostream>
using namespace std;

int main ()
{
	int N;
	cin >> N;

	while ( N-- ) {

		int x;
		int y;

		cin >> x >> y;

		if ( x == y || x == y + 2 ) {

			if ( x == y ){
				if(x%2==0 && y%2==0)
				cout << x + y << endl;
				else
				cout << x + y -1 << endl;
			}

			else{
				if(x%2==0 && y%2==0)
				cout << x + y << endl;
				else
				cout << x + y -1 << endl;
			}
		}

		else
			cout << "No Number" << endl;

	}
	return 0;
}

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