// UUID: a56dd5ce-e5c2-45e9-83b3-1771112f81cf
#include <bits/stdc++.h>
#include <cstdint>
using namespace std;
//#define int long long
//#define INT_MIN LLONG_MIN
//#define INT_MAX LLONG_MAX

int32_t main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
	int n;
    cin >> n;
    vector<int> v(n);
    for (int i=0; i<n; i++) cin >> v[i];
    int left=0,diff_trit=0,result_length=0,result_start=0;
    for (int right=0; right<n; right++) {
        if (v[left]!=v[right]) {
            if (diff_trit==0&&abs(v[left]-v[right])==1) {
                diff_trit = v[right]-v[left];
            } else if (v[right]!=v[left]+diff_trit) {
                left=right-1;
                diff_trit=0;
                if (abs(v[left]-v[right])==1) {
                    diff_trit = v[right]-v[left];
                } else {
                    left = right;
                }
            }
        }
        if (result_length<right-left+1) {
            result_length=right-left+1;
            result_start = left;
        }
    }
    cout << result_length << ' ' << result_start+1;
}