Solution: Valid Triangle Number
Explore the solution to the valid triangle number problem by applying the sort and search pattern. Understand how sorting simplifies the validation of triangle sides and how to use two-pointer iteration to count valid combinations efficiently while mastering key concepts of sorting and searching.
We'll cover the following...
Statement
Given an array of integers, nums, determine the number of triplets of distinct indices (i, j, k) that can be selected from the array such that the values at those indices can form the sides of a valid triangle.
Return this count as the result.
Note: The triplet of indices is treated as an unordered combination, not a permutation. For example, indices (0, 1, 2) and (2, 1, 0) represent the same triplet and should be counted once.
Constraints:
nums.lengthnums[i]...