> #include<iostream>
> using namespace std;
> 
> int main()
> {
>     int n;
>     int sum;
>     int mul;
>     cin>>n;
>     for(int i =0; i<n; i++)
>     {
>             cin>>sum>>mul;
>             if(sum<mul)
>             cout<<"impossible"<<endl;
>             else if((sum-mul)%2==0)
>             cout<<(sum+mul)/2<<" "<<(sum-mul)/2<<endl;
>             else cout<<"impossible"<<endl;//如果s-d是奇数也是impossible……
>     }
>      return 0;
> }

• Re:注意这题要考虑 （s-d）是奇数的情况就可以了………… (0) 418137179 2008-11-13 09:09:33