import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int N = scan.nextInt();
		int[]K = new int[N];
		for(int i = 0; i < N; i++) {
			K[i] = scan.nextInt();
		}
		scan.close();

		if(!game(K)) {
			System.out.println(-1);
		}else {
			 System.out.println(ans[0]+" "+ans[1]+" "+ans[2]);
		}
	}
	static int[] ans = new int[3];
	static boolean game(int[] K) {
		int n = K.length;
//		if(n < 3) {
//			return false;
//		}
		for(int i = 0; i < n - 2; i++) {
			for(int j = i + 1; j < n - 1; j++) {
				for(int k = j + 1; k < n; k++) {
					int a = K[i];
					int b = K[j];
					int c = K[k];
					if(b > Math.max(a, c) || b < Math.min(a, c)) {
						int[] K1 = new int[n - 3];
						int idx = 0;
						// 残りの数列を作成する
						for(int l = 0; l < n; l++) {
							if(l == i || l == j || l == k) {
								continue;
							}
							K1[idx] = K[l];
							idx++;
						}
						if(!game(K1)) {
							ans[0] = i;
							ans[1] = j;
							ans[2] = k;
							return true;
						}
					}
				}
			}
		}
		return false;

	}
	static boolean isCheck(int a, int b, int c) {
		if(b > Math.min(a, c) || b < Math.min(a, c)) {
			return true;
		}
		return false;
	}

}