CNoodle

2020年8月27日

摘要： Design a HashMap without using any built-in hash table libraries. Implement the MyHashMap class: MyHashMap() initializes the object with an empty map. 阅读全文

posted @ 2020-08-27 07:11 CNoodle 阅读(195) 评论(0) 推荐(0)

[LeetCode] 251. Flatten 2D Vector

摘要： Design an iterator to flatten a 2D vector. It should support the next and hasNext operations. Implement the Vector2D class: Vector2D(int[][] vec) init 阅读全文

posted @ 2020-08-27 02:09 CNoodle 阅读(236) 评论(0) 推荐(0)

2020年8月26日

[LeetCode] 284. Peeking Iterator

摘要： Given an Iterator class interface with methods: next() and hasNext(), design and implement a PeekingIterator that support the peek() operation -- it e 阅读全文

posted @ 2020-08-26 15:26 CNoodle 阅读(211) 评论(0) 推荐(0)

[LeetCode] 281. Zigzag Iterator

摘要： Given two vectors of integers v1 and v2, implement an iterator to return their elements alternately. Implement the ZigzagIterator class: ZigzagIterato 阅读全文

posted @ 2020-08-26 14:09 CNoodle 阅读(242) 评论(0) 推荐(0)

[LeetCode] 582. Kill Process

摘要： You have n processes forming a rooted tree structure. You are given two integer arrays pid and ppid, where pid[i] is the ID of the ith process and ppi 阅读全文

posted @ 2020-08-26 05:46 CNoodle 阅读(607) 评论(0) 推荐(0)

[LeetCode] 686. Repeated String Match

摘要： Given two strings A and B, find the minimum number of times A has to be repeated such that B is a substring of it. If no such solution, return -1. For 阅读全文

posted @ 2020-08-26 01:50 CNoodle 阅读(256) 评论(0) 推荐(0)

2020年8月25日

[LeetCode] 341. Flatten Nested List Iterator

摘要： You are given a nested list of integers nestedList. Each element is either an integer or a list whose elements may also be integers or other lists. Im 阅读全文

posted @ 2020-08-25 12:54 CNoodle 阅读(241) 评论(0) 推荐(0)

[LeetCode] 404. Sum of Left Leaves

摘要： Find the sum of all left leaves in a given binary tree. Example: 3 / \ 9 20 / \ 15 7 There are two left leaves in the binary tree, with values 9 and 1 阅读全文

posted @ 2020-08-25 10:09 CNoodle 阅读(233) 评论(0) 推荐(0)

[LeetCode] 366. Find Leaves of Binary Tree

摘要： Given the root of a binary tree, collect a tree's nodes as if you were doing this: Collect all the leaf nodes. Remove all the leaf nodes. Repeat until 阅读全文

posted @ 2020-08-25 06:20 CNoodle 阅读(938) 评论(0) 推荐(0)

[LeetCode] 1485. Clone Binary Tree With Random Pointer

摘要： A binary tree is given such that each node contains an additional random pointer which could point to any node in the tree or null. Return a deep copy 阅读全文

posted @ 2020-08-25 03:07 CNoodle 阅读(599) 评论(0) 推荐(0)

2020年8月24日

[LeetCode] 459. Repeated Substring Pattern

摘要： Given a string s, check if it can be constructed by taking a substring of it and appending multiple copies of the substring together. Example 1: Input 阅读全文

posted @ 2020-08-24 06:25 CNoodle 阅读(473) 评论(0) 推荐(0)

2020年8月22日

[LeetCode] 565. Array Nesting

摘要： A zero-indexed array A of length N contains all integers from 0 to N-1. Find and return the longest length of set S, where S[i] = {A[i], A[A[i]], A[A[ 阅读全文

posted @ 2020-08-22 05:47 CNoodle 阅读(128) 评论(0) 推荐(0)

[LeetCode] 679. 24 Game

摘要： You have 4 cards each containing a number from 1 to 9. You need to judge whether they could operated through *, /, +, -, (, ) to get the value of 24. 阅读全文

posted @ 2020-08-22 02:37 CNoodle 阅读(217) 评论(0) 推荐(0)

2020年8月21日

[LeetCode] 364. Nested List Weight Sum II

摘要： You are given a nested list of integers nestedList. Each element is either an integer or a list whose elements may also be integers or other lists. Th 阅读全文

posted @ 2020-08-21 14:48 CNoodle 阅读(289) 评论(0) 推荐(0)

[LeetCode] 339. Nested List Weight Sum

摘要： You are given a nested list of integers nestedList. Each element is either an integer or a list whose elements may also be integers or other lists. Th 阅读全文

posted @ 2020-08-21 05:55 CNoodle 阅读(318) 评论(0) 推荐(0)

[LeetCode] 690. Employee Importance

摘要： You have a data structure of employee information, including the employee's unique ID, importance value, and direct subordinates' IDs. You are given a 阅读全文

posted @ 2020-08-21 01:06 CNoodle 阅读(199) 评论(0) 推荐(0)

2020年8月20日

[LeetCode] 824. Goat Latin

摘要： A sentence S is given, composed of words separated by spaces. Each word consists of lowercase and uppercase letters only. We would like to convert the 阅读全文

posted @ 2020-08-20 02:24 CNoodle 阅读(249) 评论(0) 推荐(0)

2020年8月19日

[LeetCode] 647. Palindromic Substrings

摘要： Given a string s, return the number of palindromic substrings in it. A string is a palindrome when it reads the same backward as forward. A substring 阅读全文

posted @ 2020-08-19 08:48 CNoodle 阅读(147) 评论(0) 推荐(0)

[LeetCode] 548. Split Array with Equal Sum

摘要： Given an array with n integers, you need to find if there are triplets (i, j, k) which satisfies following conditions: 0 < i, i + 1 < j, j + 1 < k < n 阅读全文

posted @ 2020-08-19 00:53 CNoodle 阅读(366) 评论(0) 推荐(0)

2020年8月18日

[LeetCode] 1551. Minimum Operations to Make Array Equal

摘要： You have an array arr of length n where arr[i] = (2 * i) + 1 for all valid values of i (i.e. 0 <= i < n). In one operation, you can select two indices 阅读全文

posted @ 2020-08-18 10:37 CNoodle 阅读(425) 评论(0) 推荐(0)

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