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LeetCode / Binary Search / 278번 / First Bad Version / JS

First Bad Version - LeetCode Can you solve this real interview question? First Bad Version - You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality check. Since each version is developed base leetcode.com 나쁜 버전인지 판단해서 boolean 값으로 반환하는 api가 isBadVersion 라는 이름으로 주어진다. 만약 n번째 버전이 나쁜..

LeetCode / Binary Search / 704번 / Binary Search / JS

Binary Search - LeetCode Can you solve this real interview question? Binary Search - Given an array of integers nums which is sorted in ascending order, and an integer target, write a function to search target in nums. If target exists, then return its index. Otherwise, return -1. leetcode.com 주어진 nums 배열에서 target의 값이 몇번째 인덱스에 존재하는지 이분탐색으로 찾는 문제이다. /** * @param {number[]}..

LeetCode / Tree / 102번 / Binary Tree Level Order Traversal / JS

Binary Tree Level Order Traversal - LeetCode Can you solve this real interview question? Binary Tree Level Order Traversal - Given the root of a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level). Example 1: [https://assets.leetcode.com/u leetcode.com Level Order, 즉 한 Level(=depth)씩 탐색하는 문제이다. BFS와 같다. /** * Defi..

LeetCode / Tree / 589번 / N-ary Tree Preorder Traversal / JS

N-ary Tree Preorder Traversal - LeetCode Can you solve this real interview question? N-ary Tree Preorder Traversal - Given the root of an n-ary tree, return the preorder traversal of its nodes' values. Nary-Tree input serialization is represented in their level order traversal. Each group of chil leetcode.com 전위순회로 트리를 탐색하는 문제이다. 전위순회의 순서는 왼쪽 하위노드 -> 루트 -> 오른쪽 하위노드의 순서이다...

LeetCode / Greedy / 409번 / Longest Palindrome / JS

Longest Palindrome - LeetCode Can you solve this real interview question? Longest Palindrome - Given a string s which consists of lowercase or uppercase letters, return the length of the longest palindrome that can be built with those letters. Letters are case sensitive, for example, leetcode.com 주어진 문자열의 문자들로 만들 수 있는 문자열 중 가장 긴 팰린드롬 문자열을 만들었을 때 그 길이가 몇인지 반환하면 되는 문제이다. * ..

LeetCode / Greedy / 121번 / Best Time to Buy and Sell Stock / JS

Best Time to Buy and Sell Stock - LeetCode Can you solve this real interview question? Best Time to Buy and Sell Stock - You are given an array prices where prices[i] is the price of a given stock on the ith day. You want to maximize your profit by choosing a single day to buy one stock and choosin leetcode.com 당일의 주가들이 배열로 주어진다. 언제 매수를 해서 언제 매도를 하면 가장 큰 수익을 낼 수 있는지 확인한 후..