记录编号	116172	评测结果	AAAAAAAAAA
题目名称	数星星	最终得分	100
用户昵称	HouJikan	是否通过	通过
代码语言	C++	运行时间	1.010 s
提交时间	2014-08-24 19:48:11	内存使用	0.32 MiB

#include <iostream>
#include <cstring>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <algorithm>
#include <queue>
#include <stack>
#include <map>
#include <set>
#include <list>
#include <vector>
#include <ctime>
#include <iterator>
#include <functional>
#define pritnf printf
#define scafn scanf
#define For(i,j,k) for(int i=(j);i<=(k);(i)++)
using namespace std;
typedef long long LL;
typedef unsigned int Uint; 
const int INF=0x7ffffff;
//==============struct declaration==============
struct points
{
  int x,y;
  points(){};
  points(int x,int y):x(x),y(y){};
  points operator -(const points p)
  {
    return points(x-p.x,y-p.y);
  }
};
//==============var declaration=================
points star[1001];
//==============function declaration============

//==============main code=======================
int main()
{  
  string FileName="stars";//程序名 
  string FloderName="COGS";//文件夹名 
  freopen((FileName+".in").c_str(),"r",stdin);
  freopen((FileName+".out").c_str(),"w",stdout);
#ifdef DEBUG  
  system(("cp C:\\Users\\Administrator\\Desktop\\"+FloderName+"\\standard.cpp C:\\Users\\Administrator\\Desktop\\"+FloderName+"\\submit.txt").c_str());
#endif   
  int n;
  scanf("%d",&n);
  For(i,1,n)
    scanf("%d%d",&star[i].x,&star[i].y);
  int maxv=0;
  For(first,1,n)
    For(sec,first+1,n)
    {
      points xx=star[first]-star[sec];
      int cnt=2;
      For(third,sec+1,n)
      {
        points yy=star[first]-star[third];
        if (xx.x*yy.y-xx.y*yy.x==0)
          cnt++;
      } 
      maxv=max(cnt,maxv);
    }
  cout<<maxv<<endl;
  return 0;
}
//================fuction code====================