Search
⌘K
Get Premium
Leetcode 611. Valid Triangle Number
Count the number of triplets (i, j, k) from nums that can form triangle side lengths — i.e., three values a ≤ b ≤ c must satisfy a + b > c. With n ≤ 1000 the key is to enforce the triangle inequality efficiently (commonly by sorting and using a two‑pointer counting pattern to achieve O(n^2) rather than O(n^3)).
Question Timeline
See when this question was last asked and where, including any notes left by other candidates.
All Regions
Comments
Hello Interview Premium
Your account is free and you can post anonymously if you choose.