/******************************************************************************

                              Online C++ Compiler.
               Code, Compile, Run and Debug C++ program online.
Write your code in this editor and press "Run" button to compile and execute it.

*******************************************************************************/

#include <iostream>

using namespace std;

int a, nizin[100], nizout[1000], br = 1, nizcount=0;
string x;

int main()
{
    cin>>a;
    for(int i = 0; i < a; i++){
        cin>>nizin[i];
        x+=to_string(nizin[i]);
    }
    char temp = x[0];
    for(int i = 1; i < x.length(); i++){
        if(x[i] == temp){
            br++;
        } else {
            nizout[nizcount] = temp-48;
            nizcount++;
            nizout[nizcount] = br;
            nizcount++;
            br = 1;
            temp = x[i];
        }
    }
    for(int i = 0; i < nizcount; i++){
        cout<<nizout[i]<<" ";
    }
    cout<<temp<<" "<<br;
    return 0;
}