## Solved! Leetcode 1129: Shortest Path with Alternating Colors

source: https://leetcode.com/problems/shortest-path-with-alternating-colors/ You are given an integer n, the number of nodes in a directed graph where the nodes are labeled from 0 to n – 1. Each edge is red or blue in this graph, and there could be self-edges and parallel edges. You are given two arrays redEdges and blueEdges where: redEdges[i] = ...

## Solved! Leetcode 2477. Minimum Fuel Cost to Report to the Capital

source: https://leetcode.com/problems/minimum-fuel-cost-to-report-to-the-capital/description/ There is a tree (i.e., a connected, undirected graph with no cycles) structure country network consisting of n cities numbered from 0 to n – 1 and exactly n – 1 roads. The capital city is city 0. You are given a 2D integer array roads where roads[i] = [ai, bi] denotes that ...

## Solved! Leetcode 1463. Cherry Pickup II

source: https://leetcode.com/problems/cherry-pickup-ii/description/ Cherry Pickup II You are given a rows x cols matrix grid representing a field of cherries where grid[i][j] represents the number of cherries that you can collect from the (i, j) cell. You have two robots that can collect cherries for you: Robot #1 is located at the top-left corner (0, 0), ...

## Solved! Leetcode 1236: Web Crawler

source: https://leetcode.com/problems/web-crawler/description/ Given a url startUrl and an interface HtmlParser, implement a web crawler to crawl all links that are under the same hostname as startUrl. Return all urls obtained by your web crawler in any order. Your crawler should: Start from the page: startUrl Call HtmlParser.getUrls(url) to get all urls from a webpage of ...

## Solved! Leetcode 2431. Maximize Total Tastiness of Purchased Fruits

source: https://leetcode.com/problems/maximize-total-tastiness-of-purchased-fruits/description/ Maximize Total Tastiness of Purchased Fruits You are given two non-negative integer arrays price and tastiness, both arrays have the same length n. You are also given two non-negative integers maxAmount and maxCoupons. For every integer i in range [0, n – 1]: price[i] describes the price of ith fruit. tastiness[i] describes the ...

## Solved! Leetcode 1641. Count Sorted Vowel Strings

source: https://leetcode.com/problems/count-sorted-vowel-strings/description/ Count Sorted Vowel Strings Given an integer n, return the number of strings of length n that consist only of vowels (a, e, i, o, u) and are lexicographically sorted. A string s is lexicographically sorted if for all valid i, s[i] is the same as or comes before s[i+1] in the alphabet. ...

## Solved! Leetcode 369. Plus One Linked List

source: https://leetcode.com/problems/plus-one-linked-list/description/ Plus One Linked List Given a non-negative integer represented as a linked list of digits, plus one to the integer. The digits are stored such that the most significant digit is at the head of the list. Example 1: Input: head = [1,2,3] Output: [1,2,4] Example 2: Input: head = [0] Output: [1] ...

## Solved! Leetcode 518: Coin Change II

source: https://leetcode.com/problems/coin-change-ii/description/ Coin Change II You are given an integer array coins representing coins of different denominations and an integer amount representing a total amount of money. Return the number of combinations that make up that amount. If that amount of money cannot be made up by any combination of the coins, return 0. You ...

## Solved! Leetcode 438: Find All Anagrams in a String

source: https://leetcode.com/problems/find-all-anagrams-in-a-string/description/ An Anagram is a word or phrase formed by rearranging the letters of a different word or phrase, typically using all the original letters exactly once. Given two strings s and p, return an array of all the start indices of p’s anagrams in s. You may return the answer in any order. ...

## Solved! Leetcode 2361: Minimum Costs Using the Train Line

source: https://leetcode.com/problems/minimum-costs-using-the-train-line/ A train line going through a city has two routes, the regular route and the express route. Both routes go through the same n + 1 stops labeled from 0 to n. Initially, you start on the regular route at stop 0. You are given two 1-indexed integer arrays regular and express, both ...