#include <iostream>

using namespace std;

int main()
{
    int n;
    cin >> n;

    pair<int, int> out = {0,0}, minmax, length;
    bool init = false, started = false;
    int hight;
    for (int i = 0; i < n; i++) {
        cin >> hight;
        if (!started) {
            length = { 1, i + 1 };
            minmax.first = hight;
            started = true;
        }
        else if (!init && (minmax.first + 1 == hight || minmax.first - 1 == hight ) ) {
            length.first++;
            minmax.second = hight;
            init = true;
        }
        else if (minmax.first == hight || minmax.second == hight) {
            length.first++;
        }
        else {
            init = false;
            minmax.first = hight;
            started = true;
            if (out.first < length.first) {
                out = length;
            }
            length = { 1, i + 1 };
        }
    }
    if (out.first < length.first) {
        out = length;
    }
    cout << out.first << " " << out.second;
}