Online JudgeProblem SetAuthorsOnline ContestsUser
Web Board
Home Page
F.A.Qs
Statistical Charts
Problems
Submit Problem
Online Status
Prob.ID:
Register
Update your info
Authors ranklist
Current Contest
Past Contests
Scheduled Contests
Award Contest
User ID:
Password:
  Register

Re:AC 了 110ms~

Posted by 070220219 at 2009-11-11 12:07:17 on Problem 1631
In Reply To:AC 了 110ms~ Posted by:810974380 at 2009-08-25 15:54:46
我的代码,390ms

#include <iostream>
#include <cstring>
#include <fstream>
using namespace std;
int p[40000],a[40000],n,len;
void binary_search(int k)
{
      
      int left=1,right=len,mid=0;
      while(left<=right)            因为开始这里条件写成了while(left!=left),出现了 left=1,right=0 的情况,死循环,狂TLE>_<……  欲哭无泪……
      {
             mid=(right+left)/2;
             if(k>a[mid])
                 left=mid+1;
             else
                 right=mid-1;
      }
      if(a[left]>k)
         a[left]=k;
      else
         a[left+1]=k;
}
int main()
{
      int t;
      cin>>t;
      while(t--)
      {
             cin>>n;
             for(int i=1;i<=n;i++)
                  cin>>p[i];
             memset(a,0,sizeof(a));
             len=1;
             a[1]=p[1];
             for(int i=2;i<=n;i++)
             {
                   if(p[i]<a[len])
                   {
                         
                         binary_search(p[i]);
                   }
                   else
                   {
                         len++;
                         a[len]=p[i];
                   }
             }
             cout<<len<<endl;
      }
      return 0; 
}

Followed by:

Post your reply here:
User ID:
Password:
Title:

Content:

Home Page   Go Back  To top


All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator