总算弄完了！！！

感谢唐老师！！！

#include<iostream>
#include<cmath>
using namespace std;
int main(){
    long long n,e,d,k,x,y,z,m,p,q,dt;
    cin>>k;
    for(int i=0;i<k;++i){
        cin>>n>>d>>e;
        m=n-e*d+2;
        dt=m*m-4*n;
        if(dt<0){
            cout<<"NO"<<endl;
            continue;
        }
        else{
            x=sqrt(dt);
            if(x*x!=dt){
                cout<<"NO\n";
                continue;
            }
            if((m-x)%2) cout<<"NO\n";
            else{
                p=(m-x)/2;
                q=n/p;
                if(p>q) swap(p,q);
                cout<<p<<" "<<q<<"\n";
            }
        }
    }
    return 0;
}