UVA-10812

 প্রবলেমটি পড়ুন এবং বুঝুন

#include<iostream>
#include<cmath>

using namespace std;

void inquary(unsigned long long int s,unsigned long long int d)
{
    unsigned long long int x1,y1,x2,y2;
    x1=(s+d)/2;
    y1=(s-x1);
    if(x1+y1==s && x1-y1==d)
        cout<<x1<<" "<<y1<<endl;
    else
    {
        y2=(s+d)/2;
        x2=(s-y2);
        if(x2+y2==s && y2-x2==d)
        cout<<y2<<" "<<x2<<endl;
        else
            cout<<"impossible\n";
    }
}

int main()
{
    unsigned long long int test,s,d;
    cin>>test;
    while(test--)
    {
        cin>>s>>d;
        if(s<d)
            cout<<"impossible\n";
        else
        inquary(s,d);
    }
    return 0;
}