为什么不能骗50pts

#include<bits/stdc++.h>
using namespace std;
int main(){
	int T,m;
	scanf("%d%d",&T,&m);
	for(int i=0;i<T;i++){
		double a,b,c;
		scanf("%lf%lf%lf",&a,&b,&c);
		if(b*b-4*a*c>=0){
			if(b==0&&c==0)
				printf("0\n");
			else 
				printf("%lf\n",max(((-b+sqrt(b*b-4*a*c))/2.0/a),((-b-sqrt(b*b-4*a*c))/2.0/a)));
		}
		else {
			printf("NO\n");
		}
	}
	return 0;
}