Leetcode 3024. Type of Triangle

Problem

You are given a 0-indexed integer array nums of size 3 which can form the sides of a triangle.

• A triangle is called equilateral if it has all sides of equal length.
• A triangle is called isosceles if it has exactly two sides of equal length.
• A triangle is called scalene if all its sides are of different lengths.

Return a string representing the type of triangle that can be formed or “none” if it cannot form a triangle.

Algorithm

Simply determine the type of triangle based on the given conditions.

Code

class Solution:
    def triangleType(self, nums: List[int]) -> str:
        if nums[0] == nums[1] and nums[0] == nums[2]:
            return "equilateral"
        if nums[0]+nums[1]<=nums[2] or nums[0]+nums[2]<=nums[1] or nums[1]+nums[2]<=nums[0]:
            return "none"
        if nums[0] == nums[1] or nums[0] == nums[2] or nums[1] == nums[2]:
            return "isosceles"
        return "scalene"