10812 - Beat the Spread!

#include<stdio.h>

int main()
{
int c,sum,dif;
scanf("%d",&c);
while(c--){
scanf("%d%d",&sum,&dif);
int a;
for(a=0;a<=sum;a++)
if(sum-2*a==dif||sum-2*a==-dif)
{if(a<(sum-a)) a=(sum-a);
goto print;}
puts("impossible");
if(0)
print: printf("%d %d\n",a,sum-a);
}

return 0;}