1457.cpp

来自「acm acmacmacmacmacmacmacmacmacmacmacmac」· C++ 代码 · 共 15 行

#include<iostream>
using namespace std;
int main()
{
 int i,n,s,d;
 cin>>n;
    for(i=0;i<n;i++)
	{
		cin>>s>>d;
		if(s<d||(s+d)%2==1)
		cout<<"impossible"<<endl;
		else cout<<(s+d)/2<<" "<<(s-d)/2<<endl;
	}
 return 0;
}