链接：
https://vjudge.net/contest/163018#problem/I

#include<cstdio>
#include<cstring>
#include<cmath>
#include<cstdlib>
#include<queue>
#include<algorithm>
#include<iostream>
#include<set>
using namespace std;
//求最长上升子序列的长度
const int mmax = 600100;
const int inf = 0x3f3f3f3f;
int dp[mmax],data[mmax],da[mmax];
int n,m,k;
int main()
{
    while(cin>>n)
    {
           set<int>o;
           int num;
           set<int>::iterator it;
           for(int i=1;i<=n;i++)
           {
               scanf("%d",&num);
               if(o.empty())
                o.insert(num);
               else
               {
                    it = o.lower_bound(num);
                    if(it!=o.end())
                        o.erase(it);
                    o.insert(num);
               }
           }
           printf("%d\n",o.size());
           //最后得到的是一个递减数列
    }

    return 0;
}