BOJ_11053.java

import java.io.*;
import java.util.*;

public class BOJ_11053 {
    public static void main(String[] args) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        int N = Integer.parseInt(br.readLine());

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

        int[] dp = new int[N];
        for (int i = 0; i < N; i++) {
            dp[i] = 1; // 초기화
        }

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

        int max = 0;
        for (int i = 0; i < N; i++) {
            if (dp[i] > max) {
                max = dp[i];
            }
        }

        System.out.println(max);

        br.close();
    }
}