Main.java

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.StringTokenizer;

public class Main {
    public static void main(String[] args) throws IOException{
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        StringTokenizer st = new StringTokenizer(br.readLine());
        int N = Integer.parseInt(st.nextToken());

        int[] arr = new int[N];
        st = new StringTokenizer(br.readLine());
        for(int i=0; i<N; i++) {
            arr[i] = Integer.parseInt(st.nextToken());
        }

        int[] dp = new int[N];
        Arrays.fill(dp, 1);
        
        for(int i=1; i<N; i++){
            for(int j=0; j<i; j++){
                if(arr[j] < arr[i]){
                    dp[i] = Math.max(dp[i], dp[j]+1);
                }
            }
        }

        int max = 0;
        for(int num : dp){
            max = Math.max(num, max);
        }

        System.out.println(max);

        br.close();
    }
    
}