#include <iostream>
using namespace std;
int main()
{
    int stmax=0,lmax=0,l=0,dr=0,st=0,n,i,v[1000];
    cin>>n;
    for(i=1;i<=n;i++)
        cin>>v[i];
    i=1;
    while(i<=n && v[i]!=0)
            i++;
    if(i<=n)
    {
        st=stmax=i;l=1;lmax=1;
        i++;
        while(i<=n)
        {
            if(v[i]==0)
            {
                l++;
                if(l>lmax)
                {
                    lmax=l;
                    stmax=st;
                }
            }
            else
            {
                while(i<=n && v[i]!=0)
                    i++;
                if(i<=n)
                {
                    st=i;
                    l=1;
                }
            }
            i++;
          }
    }

      cout<<stmax<<' '<<stmax+lmax-1;
      return 0;
}