Problem: Valid Triangle Number

Medium

30 min

Explore how to identify the number of valid triangle triplets in an integer array by sorting values and using the two-pointer approach. Understand the triangle inequality rule and apply efficient sorting and search patterns to solve this coding interview problem.

Statement

Given an array of integers, nums, determine the number of unique triplets that can be selected from the array such that the selected values can form the sides of a valid triangleA triangle is valid if the sum of the lengths of any two smaller sides is strictly greater than the length of the third largest side. For three sides a, b, c (such that a ≤ b ≤ c), the condition to form a valid triangle is a + b > c.. Return this count as the result.

Constraints:

$1 <=$ nums.length $<= 1000$
$0 <=$ nums[i] $<= 1000$

Problem: Valid Triangle Number

Medium

30 min

Statement

Constraints:

$1 <=$ nums.length $<= 1000$
$0 <=$ nums[i] $<= 1000$

Problem: Valid Triangle Number

Statement

Examples

Understand the problem

Figure it out!

Try it yourself

Problem: Valid Triangle Number

Statement

Examples

Understand the problem

Figure it out!

Try it yourself