#include<iostream>
#include<cstdio>
#include<cmath>
#include<cassert>
using namespace std;
int x[5],y[5];

int judge()
{
	int i,j;
	
	for(i=0;i<3;i++)
	{
		if(x[i]==0 && y[i]==0)return 0;
		
	}
	for(i=0;i<3;i++)
	{
		j=(i+1)%3;
		int m1=(x[i]*x[j]+y[i]*y[j]);
		int m2=(x[i]*y[j]-x[j]*y[i]);
		if(m2==0 && m1<0)return 0;
	}
	
	for(i=0;i<3;i++)
	{
		j=(i+1)%3;
		int mul=(x[i]*x[j]+y[i]*y[j]);
		if(mul>=0)continue;
		mul=mul*mul;
		int d1=(x[i]*x[i]+y[i]*y[i]);
		int d2=(x[j]*x[j]+y[j]*y[j]);
		if(mul*4>d1*d2)return 1;
	}
	

	
	
	return 0;
	
}


		
int main()
{
	int r;
	
	int cas;
	char temp[100];
	scanf("%d",&cas);
	while(cas--)
	{
		scanf("%s",temp);
		assert(strlen(temp)<3);
		sscanf(temp,"%d",&r);
		int i;
		for(i=0;i<3;i++)scanf("%d %d",&x[i],&y[i]);
		
		if(judge())
		{
			printf("Yes\n");
		}
		else
		{
			printf("No\n");
		}
	}
	
	return 0;
}

• Re:who can tell me what is wrong for my code? (1094) atlas_of_rruucc 2004-07-08 19:35:24
  • 如果在原点上应该就是No了吧？ (24) wangchen1ren 2004-07-14 18:01:26
    • Re:如果在原点上应该就是No了吧？ (3) Trident 2006-01-05 21:58:54
      • 我没判...也过了 (7) mixter 2006-11-01 15:57:15
  • Re:who can tell me what is wrong for my code? (50) galois_godel 2004-07-17 10:29:56
• Re:who can tell me what is wrong for my code? (1165) forlfs 2013-06-15 21:47:28