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Java Solution for LeetCode algorithm problems, continually updating
611\. Valid Triangle Number
Medium
Given an integer array `nums`, return _the number of triplets chosen from the array that can make triangles if we take them as side lengths of a triangle_.
**Example 1:**
**Input:** nums = [2,2,3,4]
**Output:** 3
**Explanation:** Valid combinations are: 2,3,4 (using the first 2) 2,3,4 (using the second 2) 2,2,3
**Example 2:**
**Input:** nums = [4,2,3,4]
**Output:** 4
**Constraints:**
* `1 <= nums.length <= 1000`
* `0 <= nums[i] <= 1000`