[UVa]10812:Beat the Spread!

暴力法得解。

[C](0.012)

	#include<stdio.h>
	#include<math.h>
	int main()
	{
	int n;
	while( scanf( "%d", &n ) != EOF )
	{
	int s, d;
	int i, j;
	for( i = 0 ; i < n ; i++ )
	{
	scanf( "%d%d", &s, &d );
	int ok = 0;
	for( j = s ; j >= s-j ; j-- )
	{
	if( abs(s-2*j) == d )
	{
	printf( "%d %d\n", j, s-j );
	ok = 1;
	}
	}
	if( !ok )
	printf( "impossible\n" );
	}
	}
	return 0;
	}

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