题解 | #A加B,A模B#
A加B,A模B
https://ac.nowcoder.com/acm/problem/253632
#include<bits/stdc++.h>
using namespace std;
int main()
{
int T;
cin>>T;
while(T--)
{
long long n, m, a;
cin>>n>>m;
a=n-m;
if(a>m)
cout<<m<<" "<<a<<endl;
else cout<<-1<<endl;
}
return 0;
}
