hdu 1257 贪心

HDU 1257

题意：中文

思路：贪心

AC代码：

#include "iostream"
#include "iomanip"
#include "string.h"
#include "stack"
#include "queue"
#include "string"
#include "vector"
#include "set"
#include "map"
#include "algorithm"
#include "stdio.h"
#include "math.h"
#pragma comment(linker, "/STACK:102400000,102400000")
#define bug(x) cout<<x<<" "<<"UUUUU"<<endl;
#define mem(a,x) memset(a,x,sizeof(a))
#define step(x) fixed<< setprecision(x)<<
#define mp(x,y) make_pair(x,y)
#define pb(x) push_back(x)
#define ll long long
#define endl ("\n")
#define ft first
#define sd second
#define lrt (rt<<1)
#define rrt (rt<<1|1)
using namespace std;
const long long INF = 1e18+1LL;
const int inf = 1e9+1e8;
const int N=1e5+100;
const ll mod=1e9+7;

set<int> se;
int n,ans;
int main(){
    ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
    while(cin>>n){
        se.clear();
        int x,mi; cin>>x; se.insert(x);
        for(int i=2; i<=n; ++i){
            cin>>x;
            if(se.lower_bound(x)==se.end()){
                se.insert(x);
            }
            else{
                se.erase(se.lower_bound(x));
                se.insert(x);
            }
        }
        cout<<se.size()<<endl;
    }
    return 0;
}