CCF 数字排序

import java.util.Scanner;public class Main {      public static void main(String[] args) {          new Main().run();      }      public void run(){          Scanner sc=new Scanner(System.in);        int n=sc.nextInt();         int [] arrs=new int [1001];        int i,j;        for(int i1=0;i1<n;i1++){            arrs [i1]=0;        }        for(int k=0;k<n;k++){            int a=sc.nextInt();            arrs [a]++;        }        for(i=1001;i>0;i--){            for(j=0;j<1001;j++){                if(arrs[j]==i){                    System.out.println(j+" "+arrs[j]);                }            }        }    }}