P8814

#include<bits/stdc++.h>
using namespace std;
long long n,a,b,c,x,y;
int main(){
	cin>>n;
	for(int i=1;i<=n;i++)
    {
		cin>>a>>b>>c;
		x=a-b*c+2;
		y=sqrt(abs(x*x-a*4));
		if(y*y==abs(x*x-a*4))
			cout<<(x-y)/2<<" "<<(x+y)/2<<"\n";
		else cout<<"NO\n";
	}
	return 0;
}

90分，#12WA了