#include <iostream>
using namespace std;
int main()
{ int n,a[1000],i=0,s=1,k;
cin>>n;
for(i=0; i<n; i++) cin>>a[i];
while(i<n)
{ k=i+1; s=1;
if(a[i]!=a[k]) cout<<s<<" "<<a[i];
else while(a[i]==a[k]) { k++; s++; }
cout<<s<<" "<<a[i];
i=k+1; }
return 0; }