POJ 2301

#include<iostream>
#include<stdio.h>
using namespace std;

int main()
{

    //freopen("acm.acm","r",stdin);
    int i;
    
    int s;
    int d;
    int num;
    cin>>num;
    while(num--)
    {
    cin>>s;
    cin>>d;
    for(i = s; i >= (s-1)/2; i --)
    {
        if(i - (s - i) == d)
        {
            cout<<i<<" "<<s - i<<endl;
            break;
        }
    }

    if(i == (s-1)/2 - 1)
        cout<<"impossible"<<endl;
    }
}