hdu1194-Beat the Spread!

http://acm.hdu.edu.cn/showproblem.php?pid=1194

理解题意

 

#include<iostream>

#include<cstring>

#include<cstdio>



using namespace std ;



int main()

{

		int Case ;

		int m , n;

		int a , b ;

		 cin >> Case ;

		while( Case-- )

		{

			cin >> m >> n ;

			if( m < n )

				cout << "impossible" << endl ;

			else if( ( m + n ) % 2 != 0)

				cout << "impossible" << endl ;

			else

			{

				a = ( m + n ) / 2 ;

				b = ( m - n ) / 2 ;

				if( a < b )

					int t = a , a = b , b = t ;

				cout << a << " " << b << endl ; 

			}

		}

		return 0 ;

}