记录编号	116118	评测结果	AAAAAAAAAA
题目名称	[HNOI 2004] 宠物收养所	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	0.346 s
提交时间	2014-08-24 15:38:56	内存使用	3.15 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==============

//==============var declaration=================
int nowk;
LL sum=0;
int cnt=1;
set <int> special;
//==============function declaration============

//==============main code=======================
int main()
{  
  string FileName="pet";//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,a,b;
  set<int>::iterator it1,it2;
  special.clear();
  scanf("%d",&n);
  scanf("%d%d",&nowk,&a);
  special.insert(a);
  For(i,2,n)
  {
    scanf("%d%d",&a,&b);
    if (a==nowk||cnt==0)
    {
      if (cnt==0)
        nowk=a;
      special.insert(b);
      cnt++;
    }
    else
    {
      it2=special.lower_bound(b);
      int y=(*it2);
      if (it2==special.begin())
      {
        special.erase(y);
        sum+=abs(y-b);
        //printf("person %d: %d\n",i,y);
        cnt--;sum=sum%1000000;
        continue;
      }
      if (it2==special.end())
      {
        int x=(*(--it2));
        special.erase(x);
        //printf("person %d: %d\n",i,x);
        cnt--;sum+=abs(x-b);
        sum=sum%1000000;
        continue;
      }
      int x=(*(--it2));
      if (abs(x-b)<=abs(y-b))
      {
        special.erase(x);
        sum+=abs(x-b);
        //printf("person %d: %d\n",i,x);
      }
      else
      {
        special.erase(y);
        sum+=abs(y-b);
        //printf("person %d: %d\n",i,y);
      }
      cnt--;sum=sum%1000000; 
   }
  } 
  printf("%d\n",sum);
  return 0;
}
//================fuction code====================