Valid Triangle - Algorithm

$1.$ Sort the three sides in ascending order: a ≤ b ≤ c $2.$ Check if a + b > c $3.$ If true, return valid $4.$ If false, return invalid

Example: sides [3, 4, 5]. After sorting: 3, 4, 5. Check 3 + 4 > 5? Yes (7 > 5), so valid.

Example: sides [1, 2, 10]. After sorting: 1, 2, 10. Check 1 + 2 > 10? No (3 < 10), so invalid.