Solution.java

import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

    static int runningTime(int[] arr) {
        int counter = 0;
         for (int i = 1; i < arr.length; i++) {
            int tmp = arr[i];
            int j = i - 1;
            while (j >= 0 && tmp < arr[j]) {
                arr[j+1] = arr[j];
                j--;
                counter++;
            }
            arr[j+1] = tmp;
        }
        return counter;
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] arr = new int[n];
        for(int arr_i = 0; arr_i < n; arr_i++){
            arr[arr_i] = in.nextInt();
        }
        int result = runningTime(arr);
        System.out.println(result);
        in.close();
    }
}