求解一元二次方程

#include<bits/stdc++.h>
using namespace std;
int a,b,c;
int solve1(){
	return (b*b-4*a*c);
}
void solve2(int u,int d){
	//cout<<u<<" "<<d;
	if(u%d==0)cout<<u/d;
	else{
		int t=__gcd(u,d);
		if(u<0&&d>0||d<0&&u>0)cout<<"-"<<abs(u/t)<<"/"<<abs(d/t);
		else cout<<u/t<<"/"<<d/t;
	} 
}
void solve4(int u,int d){
	if(u%(d*d)==0)u/=(d*d),d=1;
	
		int s=1;
		for(int i=2;i*i<=u;++i){
			while(u%(i*i)==0){
				//cout<<i<<endl;
				s*=i;
				u/=(i*i);
			}
		}
		
		if(b!=0)cout<<"+";
		d=abs(d);
		//cout<<endl<<u<<endl;
		if(s==1){
			cout<<"sqrt("<<u<<")";	
			if(d!=1)cout<<"/"<<d; 
		}
		else{
            //cout<<s<<" "<<d<<endl;
			if(s%d==0){
				cout<<s/d<<"*sqrt("<<u<<")";
			}
			else if(__gcd(s,d)!=1){
				int i=__gcd(s,d);
				if(s/i==1&&d/i!=1)cout<<"sqrt("<<u<<")/"<<(d/i);
                else cout<<(s/i)<<"*sqrt("<<u<<")/"<<(d/i);
			}
			else {
				cout<<s<<"*sqrt("<<u<<")/"<<d;
			}
		}
	
}
void solve3(int i){
	if(b!=0){
		solve2(-b,2*a);
	}
	
	solve4(i,2*a);
}
int main(){
	freopen("uqe.in","r",stdin);
	freopen("uqe.out","w",stdout);
	int t,m;
	cin>>t>>m;
	while(t--){
		cin>>a>>b>>c;
		int i=solve1();
	//	cout<<i<<" ";
		if(i>=0){
			int ti=sqrt(i);
			if(ti*ti==i){
				//cout<<ti<<" "<<i;
                //cout<<" "<<ti*ti;
				if(a>0)solve2(-b+ti,2*a);
                else solve2(-b-ti,2*a);
			}
			else{
				solve3(i);
			}
			cout<<endl;
		}
		else{
			cout<<"NO"<<endl;
		}
	}
	fclose(stdin);
	fclose(stdout);
	return 0;
}