题解 | #Redraiment的走法#，这样更好理解一点

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int n = in.nextInt();
            int[] ints = new int[n];
            for (int i = 0; i < n; i++) {
                ints[i] = in.nextInt();
            }
            int[] countArr = new int[n];
            int maxCount = 0;
            for (int i = 1; i < n; i++) {
                for (int j = 0; j < i; j++) {
                    if (ints[j] < ints[i]){
                        countArr[i] = Math.max(countArr[j] + 1, countArr[i]);
                    }
                }
                maxCount = Math.max(maxCount,countArr[i]);
            }
            // 包括自身，加1
            System.out.println(maxCount + 1);
        }
    }
}