#include <iostream>
#include <vector>

bool judge(int a, int b, int c) {
    return !(a == b || b == c || c == a ||
             (a < b && b < c) || (a > b && b > c));
}

std::vector<int> sim(std::vector<int> v) {
    int n = v.size();

    for (int i = 0; i < n; ++i) {
        for (int j = i + 1; j < n; ++j) {
            for (int k = j + 1; k < n; ++k) {
                if (!judge(v[i], v[j], v[k])) continue;

                std::vector<int> nv;
                for (int l = 0; l < n; ++l) {
                    if (l == i || l == j || l == k) continue;
                    nv.push_back(v[l]);
                }

                if (sim(nv).empty()) {
                    return {i, j, k};
                }
            }
        }
    }

    return {};
}

void solve() {
    int n;
    std::cin >> n;

    std::vector<int> xs(n);
    for (auto& x : xs) std::cin >> x;

    auto ans = sim(xs);
    if (ans.empty()) {
        std::cout << -1 << std::endl;
    } else {
        for (auto a : ans) std::cout << a << " ";
        std::cout << std::endl;
    }
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}