题解 | 左侧严格小于计数

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.hasNext()) { // 注意 while 处理多个 case
            String length = in.nextLine();
            String line = in.nextLine();
            String[] arr = line.split(" ");
            int[] a=new int[arr.length];
            for(int i=0;i<arr.length;i++){
                a[i] = Integer.parseInt(arr[i]);
            }
            
            int[] b = new int[a.length];
            for(int i=0;i<a.length;i++){
                int count=0;
                if(i==0){
                    count = 0;
                }else{
                    for(int j=0;j<=i;j++){
                        if(a[j] < a[i]){
                            count++;
                        }
                    }
                    b[i] = count;
                }
            }

            StringBuilder sb = new StringBuilder();
            for(int i:b){
                sb.append(i+" ");
            }
            System.out.println(sb.substring(0,sb.length()));
        }
    }
}