import java.io.PrintWriter;
import java.util.Scanner;


public class P1581 {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        int n = in.nextInt();
        int [] vec=new int[n];
        for(int i=0;i<n;i++)vec[i]=in.nextInt();
        int cont=0,num;
        num=vec[0];
        for(int i=0;i<n;i++){
          if(vec[i]==num){
              cont=cont+1;
          }
          if(vec[i]!=num || i+1==n){
              if(i+1!=n){
              System.out.printf("%d %d ",cont,num);
              }else{
                  System.out.printf("%d %d",cont,num);
              }
              num=vec[i];
              cont=1;
            }

        }
        out.flush();
    }
}

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THANKS YOU, GREETINGS.

Edited by author 26.11.2015 05:45

nub qlo
int cont=0,num;
        num=vec[0];
        for(int i=0;i<n;i++){
          if(vec[i]==num){
              cont=cont+1;
          }
          if(vec[i]!=num ){
             System.out.printf("%d %d ",cont,num);
              num=vec[i];
              cont=1;
            }

        }
        System.out.printf("%d %d",cont,num);