## [Solution] Count Valid Paths in a Tree Solution Leetcode

2867. Count Valid Paths in a Tree Solution Leetcode User Accepted:513 User Tried:1524 Total Accepted:560 Total Submissions:3494 Difficulty:Hard There is an undirected tree with n nodes labeled from 1 to n. You are given the integer n and a 2D integer array edges of length n – 1, where edges[i] = [ui, vi] indicates that there is an edge between nodes ui and vi in the tree. Return the number of valid paths in … Read more

## [Solution] Beautiful Towers II Solution leetcode

2866. Beautiful Towers II Solution leetcode User Accepted:1857 User Tried:5293 Total Accepted:1941 Total Submissions:11299 Difficulty:Medium You are given a 0-indexed array maxHeights of n integers. You are tasked with building n towers in the coordinate line. The ith tower is built at coordinate i and has a height of heights[i]. A configuration of towers is beautiful if the following conditions hold: 1 <= heights[i] <= maxHeights[i] heights is a mountain array. Array heights is a mountain if … Read more

## [Solution] Beautiful Towers Solution Leetcode

2865. Beautiful Towers Solution Leetcode User Accepted:8359 User Tried:10320 Total Accepted:8758 Total Submissions:22890 Difficulty:Medium You are given a 0-indexed array maxHeights of n integers. You are tasked with building n towers in the coordinate line. The ith tower is built at coordinate i and has a height of heights[i]. A configuration of towers is beautiful if the following conditions hold: 1 <= heights[i] <= maxHeights[i] heights is a mountain array. Array heights is a mountain if there … Read more

## [Solution] Count the Number of Vowel Strings in Range Solution

Count the Number of Vowel Strings in Range Solution You are given a 0-indexed array of string words and two integers left and right. A string is called a vowel string if it starts with a vowel character and ends with a vowel character where vowel characters are ‘a’, ‘e’, ‘i’, ‘o’, and ‘u’. Return the number of vowel strings words[i] where i belongs to the inclusive range [left, right].   Example 1:Count the Number … Read more