#include <iostream>
using namespace std;
int n, x1005;
int main(){
cin >> n;
for(int i = 1 ; i <= n; ++i)
cin >> x[i];
int st = 0, dr = -1;
for(int i = 1 ; i <= n; ++i)
if(x[i] 0)
{
int j = i + 1;
while(j <= n && x[j] 0)
j ++;
if(j – i > dr – st + 1)
st = i, dr = j-1;
i = j;
}
cout << st << “ “ << dr;
return 0;
}