测试结果

#include<bits/stdc++.h>
//#pragma GCC optimize(1)
//#pragma GCC optimize(2)
//#pragma GCC optimize(3)
using namespace std;
typedef long double ld;
typedef long long ll;
ll t,n1,n2,e,d;
signed main(){
	//freopen("decode.in","r",stdin);
	//freopen("decode.out","w",stdout);
	std::ios::sync_with_stdio(0);
	std::cin.tie(0);
	cin>>t;
	while(t--){
		cin>>n1>>e>>d;
		n2=e*d;
		ld a=1.0,b=(n2-n1-2)*1.0,c=n1*1.0,x;
		if( b*b-4.0*a*c<0 || c/a<0 || b*-1.0/a<0 ){
			cout<<"NO\n";
			continue;
		}
		x=( -1.0*b - sqrt(b*b-4.0*a*c) )/(a*2.0);
		if( ld(ll(x))==x ) cout<<ll(x)<<" "<<ll(n1/x)<<'\n';
		else cout<<"NO\n";
	}
}