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Data Science & LeetCode for Kindergarten

2021 每天必聽Podcasts推薦! (持續更新

分享每天都會聽的七個Podcasts!!

Apr 22, 2020

Apr 22, 2020

Published in
Data Science & LeetCode for Kindergarten

251. Flatten 2D Vector

Design an iterator to flatten a 2D vector. It should support the next and hasNext operations.

May 31, 2023

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Data Science & LeetCode for Kindergarten

324. Wiggle Sort II

Given an integer array nums, reorder it such that nums[0] < nums[1] > nums[2] < nums[3]....

May 30, 2023

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Data Science & LeetCode for Kindergarten

384. Shuffle an Array

Given an integer array nums, design an algorithm to randomly shuffle the array. All permutations of the array should be equally likely as a…

May 30, 2023

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Data Science & LeetCode for Kindergarten

166. Fraction to Recurring Decimal

Given two integers representing the numerator and denominator of a fraction, return the fraction in string format.

May 30, 2023

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Data Science & LeetCode for Kindergarten

378. Kth Smallest Element in a Sorted Matrix

Given an n x n matrix where each of the rows and columns is sorted in ascending order, return the kth smallest element in the matrix.

May 30, 2023

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Data Science & LeetCode for Kindergarten

277. Find the Celebrity

Suppose you are at a party with n people labeled from 0 to n - 1 and among them, there may exist one celebrity. The definition of a…

May 30, 2023

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Data Science & LeetCode for Kindergarten

116. Populating Next Right Pointers in Each Node

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…

May 30, 2023

116. Populating Next Right Pointers in Each Node

May 30, 2023

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Data Science & LeetCode for Kindergarten

285. Inorder Successor in BST

Given the root of a binary search tree and a node p in it, return the in-order successor of that node in the BST. If the given node has no…

May 30, 2023

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Data Science & LeetCode for Kindergarten

454. 4Sum II

Given four integer arrays nums1, nums2, nums3, and nums4 all of length n, return the number of tuples (i, j, k, l) such that:

May 30, 2023

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Data Science & LeetCode for Kindergarten

348. Design Tic-Tac-Toe

Assume the following rules are for the tic-tac-toe game on an n x n board between two players:

May 30, 2023

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Data Science & LeetCode for Kindergarten

163. Missing Ranges

You are given an inclusive range [lower, upper] and a sorted unique integer array nums, where all elements are within the inclusive range.

May 29, 2023

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Data Science & LeetCode for Kindergarten

326. Power of Three

Given an integer n, return true if it is a power of three. Otherwise, return false.

May 29, 2023

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Data Science & LeetCode for Kindergarten

315. Count of Smaller Numbers After Self

Given an integer array nums, return an integer array counts where counts[i] is the number of smaller elements to the right of nums[i].

May 29, 2023

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Data Science & LeetCode for Kindergarten

340. Longest Substring with At Most K Distinct Characters

Given a string s and an integer k, return the length of the longest

May 28, 2023

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Data Science & LeetCode for Kindergarten

148. Sort List

Given the head of a linked list, return the list after sorting it in ascending order.

May 27, 2023

May 27, 2023

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Data Science & LeetCode for Kindergarten

8. String to Integer (atoi)

Implement the myAtoi(string s) function, which converts a string to a 32-bit signed integer (similar to C/C++'s atoi function).

May 26, 2023

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Data Science & LeetCode for Kindergarten

308. Range Sum Query 2D — Mutable

Given a 2D matrix matrix, handle multiple queries of the following types:

May 26, 2023

May 26, 2023

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Data Science & LeetCode for Kindergarten

395. Longest Substring with At Least K Repeating Characters

Given a string s and an integer k, return the length of the longest substring of s such that the frequency of each character in this…

May 26, 2023

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Data Science & LeetCode for Kindergarten

240. Search a 2D Matrix II

Write an efficient algorithm that searches for a value target in an m x n integer matrix matrix. This matrix has the following properties:

May 25, 2023

May 25, 2023