UVA 10812

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42

#include<iostream> using namespace std; int main() { long long n,a,b,c,d,i,l; while( cin>>n){ for(i=1; i<=n; i++) { cin>>a>>b; if(a-b<0){ cout<<"impossible"<<endl; } else{ a= a/2; b=b/2; c= a - b; d= a + b; if(d>c){ cout<<d<<" "<<c<<endl; } else { cout<<c<<" "<<d<<endl; } } } } return 0; }