蘑菇街 2017笔试编程题

import java.util.*;
 
public class Main {
    static int k;
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Scanner scanner=new Scanner(System.in);
        int n=scanner.nextInt();
        int[] array=new int[n];
        for(int i=0;i<n;i++){
            array[i]=scanner.nextInt();
        }
        int  sum=maopao(array);
        System.out.println(sum);
    }
 
    public static int maopao(int[] array)
    {
        int i=0;
        int j=0;
        int temp=0;
        int  sum=0;
        if(array.length==0){
            return 0;
        }
        for(i=0;i<array.length;i++)
        {
            for(j=0;j<array.length-1-i;j++)
            {
                if(array[j]>array[j+1]){
                    temp=array[j];
                    array[j]=array[j+1];
                    array[j+1]=temp;
                    sum+=1;
                }
            }
        }
        return sum;
    }
}