var used: []bool
var k: []int
func main()
	var n: int :: cui@inputInt()
	do @k :: #[n]int
	for i(0, n - 1)
		do @k[i] :: cui@inputInt()
	end for
	do @used :: #[n]bool
	var ans: []int :: f()
	do cui@print(ans =& null ?("-1\n", "\{ans[0]} \{ans[1]} \{ans[2]}\n"))
	
	func f(): []int
		for i(0, ^@k - 1)
			if(@used[i])
				skip i
			end if
			for j(i + 1, ^@k - 1)
				if(@used[j])
					skip j
				end if
				for k(j + 1, ^@k - 1)
					if(@used[k])
						skip k
					end if
					var a: int :: @k[i]
					var b: int :: @k[j]
					var c: int :: @k[k]
					if(!(a = b | b = c | c = a | a < b & b < c | a > b & b > c))
						do @used[i] :: true
						do @used[j] :: true
						do @used[k] :: true
						var res: []int :: f()
						do @used[i] :: false
						do @used[j] :: false
						do @used[k] :: false
						if(res =& null)
							ret[i, j, k]
						end if
					end if
				end for
			end for
		end for
		ret null
	end func
end func