#include <iostream>

using namespace std;

int main () {
    int n, x = 0, s = 0, pos1 = 0, pos2 = 0;
    cin >> n;
    int mas[n];

    for(int k = 0; k < n; k++)
        cin >> mas[k];

    for(int k = 0; k < n - 1; k++) {
        if ((mas[k + 1] > mas[k]) && (x != 1)) {
            pos1 = k;
            x = 1;
        }
        if ((mas[k + 1] > mas[k]) && (x == 1))
            pos2 = k;
    }
    pos2++;
    s = pos2 - pos1 + 1;

    cout << pos1 << " " << pos2 << "\n";

    if ((s == 2)&&(x==0))
        cout << "-1";
    else
        cout << s;

}






/*#include <iostream>

using namespace std;

int main () {
    int n, max, min;
    cin >> n;
    int mas[n];

    for (int k = 0; k < n; k++)
        cin >> mas[k];

    max = mas[0];
    min = mas[0];

    for (int k = 0; k < n; k++)
        if ((mas[k] > max) && (mas[k] % 2 == 0))
            max = mas[k];
    for (int k = 0; k < n; k++)
        if ((mas[k] < min) && (mas[k] % 2 == 1))
            min = mas[k];

    cout << min;
    cout << "\n";
    cout << max;
}

*/