Done is better than perfect

| Question If a canoe can hold 2 kids and a max weight of 150 lbs, write a function that returns the minimum number of canoes needed, given a list of kids and their weights. 번역 : 하나의 카누에는 2명의 아이를 탑승시킬 수 있고, 카누의 최대하중은 150 lbs이다. 아이들의 무게를 나타내는 list가 주어질 때 필요한 카누의 수가 최소가 되는 함수를 작성하라. | Solution 문제를 풀 때 고려한 사항 아이들이 0명일 때 알고리즘이 정상 동작해야 한다. 아이들의 무게는 lsb단위로 주어진다고 가정한다. 아이들이 홀 수 일 때와 짝수일 때 모두 함수가 정상 동작해..

| Question Given two strings s and t, determine if they are isomorphic. Two strings s and t are isomorphic if the characters in s can be replaced to get t. All occurrences of a character must be replaced with another character while preserving the order of characters. No two characters may map to the same character, but a character may map to itself. 번역 : 문자열 s와 t가 주어졌을 때 두 문자열이 isormorphic인지 판단..

| Question Pots of gold game: Two players A & B. There are pots of gold arranged in a line, each containing some gold coins (the players can see how many coins are there in each gold pot - perfect information). They get alternating turns in which the player can pick a pot from one of the ends of the line. The winner is the player which has a higher number of coins at the end. The objective is to..

| Question You have k lists of sorted integers. Find the smallest range that includes at least one number from each of the k lists. For example, List 1: [4, 10, 15, 24, 26] List 2: [0, 9, 12, 20] List 3: [5, 18, 22, 30] The smallest range here would be [20, 24] as it contains 24 from list 1, 20 from list 2, and 22 from list 3. 번역 : 정수로 이루어진 배열 k개가 주어졌을 때, 각 배열의 원소를 적어도 하나 포함하는 가장 작은 범위를 찾아라. 예를 ..

Question Given an m x n 2D binary grid [grid] which represents a map of '1's (land) and '0's (water), return the number of islands. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. You may assume all four edges of the grid are all surrounded by water. m x n 인 2차원 grid가 주어진다. grid의 1은 땅, 0은 물을 의미할 때 island의 개수를 세라. island는 물로 상하좌우가 둘러싸인 땅을 의미..

Question Given the root of a binary search tree, and an integer k, return the kth smallest value (1-indexed) of all the values of the nodes in the tree. 이진 탐색 트리와 정수 k가 주어졌을 때, 모든 노드 중 k번째로 작은 값을 리턴하는 함수를 작성하라. 제약사항 The number of nodes in the tree is n. 1 right); } int kthSmallest(TreeNode* root, int k) { vector node_val_vec; AddAllElement(node_val_vec, root); return node_val_vec[k-1]; } }; Time..

Question You are given a perfect binary tree where all leaves are on the same level, and every parent has two children. The binary tree has the following definition: 완전 이진트리가 주어진다면 같은 레벨의 노드를 모두 오른쪽으로 연결하는 함수를 작성하라. struct Node { int val; Node *left; Node *right; Node *next; } Populate each next pointer to point to its next right node. If there is no next right node, the next pointer should be s..

Question Given two integer arrays preorder and inorder where preorder is the preorder traversal of a binary tree and inorder is the inorder traversal of the same tree, construct and return the binary tree. 이진 탐색 트리의 preorder 순서와 inorder순서로 탐색한 결과인 두 배열이 주어질 때, 원래의 이진트리를 출력하라. 제약사항 1