import java.io.*; import java.util.*; class Main { public static void main(String args[])throws Exception { BufferedReader bu=new BufferedReader(new InputStreamReader(System.in)); StringBuilder sb=new StringBuilder(); String s[]=bu.readLine().split(" "); int n=Integer.parseInt(s[0]),m=Integer.parseInt(s[1]); int a[]=new int[n],i,tot=0; s=bu.readLine().split(" "); for(i=0;i