86 - Making a Height Balanced Binary Search Tree - making-a-height-balanced-binary-search-tree.txt.txt

Hi, here's your problem today. This problem was recently asked by Google:

Given a sorted list, create a height balanced binary search tree, meaning the height differences of each node can only differ by at most 1.

Here's some code to start with:
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Top | Category: Computing | Comments (0) | Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | 63916 Views, 40442 Search Bots | 104 Words

87 - Staying on a Chess Board - staying-on-a-chess-board.txt

Hi, here's your problem today. This problem was recently asked by Google:

A chess board is an 8x8 grid. Given a knight at any position (x, y) and a number of moves k, we want to figure out after k random moves by a knight, the probability that the knight will still be on the chessboard. Once the knight leaves the board it cannot move again and will be considered off the board.

Here's some starter code:
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Top | Category: Computing | Comments (0) | Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | 68760 Views, 41167 Search Bots | 94 Words

88 - Multitasking - multitasking.txt

Hi, here's your problem today. This problem was recently asked by AirBNB:

We have a list of tasks to perform, with a cooldown period. We can do multiple of these at the same time, but we cannot run the same task simultaneously.

Given a list of tasks, find how long it will take to complete the tasks in the order they are input.
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89 - Sort a Partially Sorted List - sort-a-partially-sorted-list.txt

Hi, here's your problem today. This problem was recently asked by Uber:

You are given a list of n numbers, where every number is at most k indexes away from its properly sorted index. Write a sorting algorithm (that will be given the number k) for this list that can solve this in O(n log k)

Example:
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90 - Most Frequent Subtree Sum - most-frequent-subtree-sum.txt

Hi, here's your problem today. This problem was recently asked by LinkedIn:

Given a binary tree, find the most frequent subtree sum.

Example:
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Top | Category: Computing | Comments (0) | Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | 68978 Views, 33468 Search Bots | 147 Words

91 - Fix Brackets - fix-brackets.txt

Hi, here's your problem today. This problem was recently asked by Twitter:

Given a string with only ( and ), find the minimum number of characters to add or subtract to fix the string such that the brackets are balanced.

Example:
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Top | Category: Computing | Comments (0) | Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | 70680 Views, 30486 Search Bots | 99 Words

92 - Palindrome Integers - palindrome-integers.txt

Hi, here's your problem today. This problem was recently asked by Twitter:

Given an integer, check if that integer is a palindrome. For this problem do not convert the integer to a string to check if it is a palindrome.

import math
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93 - Print a tree level-by-level, with line-breaks - print-a-tree-level-by-level,-with-line-breaks.txt

Hi, here's your problem today. This problem was recently asked by Apple:

You are given a tree, and your job is to print it level-by-level with linebreaks.

a
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Top | Category: Computing | Comments (0) | Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | 67631 Views, 49365 Search Bots | 111 Words

94 - Spreadsheet Columns - spreadsheet-columns.txt

Hi, here's your problem today. This problem was recently asked by Apple:

In many spreadsheet applications, the columns are marked with letters. From the 1st to the 26th column the letters are A to Z. Then starting from the 27th column it uses AA, AB, ..., ZZ, AAA, etc.

Given a number n, find the n-th column name.
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95 - Generate All IP Addresses - generate-all-ip-addresses.txt

i, here's your problem today. This problem was recently asked by Microsoft:

An IP Address is in the format of A.B.C.D, where A, B, C, D are all integers between 0 to 255.

Given a string of numbers, return the possible IP addresses you can make with that string by splitting into 4 parts of A, B, C, D.
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96 - Consecutive Ones - consecutive-ones.txt

Hi, here's your problem today. This problem was recently asked by Microsoft:

Return the longest run of 1s for a given integer n's binary representation.

Example:
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97 - Spreadsheet Column Title - spreadsheet-column-title.txt.txt

Hi, here's your problem today. This problem was recently asked by Amazon:

MS Excel column titles have the following pattern: A, B, C, ..., Z, AA, AB, ..., AZ, BA, BB, ..., ZZ, AAA, AAB, ... etc. In other words, column 1 is named "A", column 2 is "B", column 26 is "Z", column 27 is "AA" and so forth. Given a positive integer, find its corresponding column name.
Examples:
Input: 26
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98 - Compare Version Numbers - compare-version-numbers.txt

Hi, here's your problem today. This problem was recently asked by Amazon:

Version numbers are strings that are used to identify unique states of software products. A version number is in the format a.b.c.d. and so on where a, b, etc. are numeric strings separated by dots. These generally represent a hierarchy from major to minor changes. Given two version numbers version1 and version2, conclude which is the latest version number. Your code should do the following:
If version1 > version2 return 1.
If version1 < version2 return -1.
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99 - Reverse a Directed Graph - reverse-a-directed-graph.txt

Hi, here's your problem today. This problem was recently asked by Facebook:

Given a directed graph, reverse the directed graph so all directed edges are reversed.

Example:
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Top | Category: Computing | Comments (0) | Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | 69425 Views, 31700 Search Bots | 115 Words

100 - Absolute Path - absolute-path.txt

Hi, here's your problem today. This problem was recently asked by Facebook:

Given a file path with folder names, '..' (Parent directory), and '.' (Current directory), return the shortest possible file path (Eliminate all the '..' and '.').

Example
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101 - Design Tic-Tac-Toe - design-tic-tac-toe.txt

Hi, here's your problem today. This problem was recently asked by Google:

Design a Tic-Tac-Toe game played between two players on an n x n grid. A move is guaranteed to be valid, and a valid move is one placed on an empty block in the grid. A player who succeeds in placing n of their marks in a horizontal, diagonal, or vertical row wins the game. Once a winning condition is reached, the game ends and no more moves are allowed. Below is an example game which ends in a winning condition:

Given n = 3, assume that player 1 is "X" and player 2 is "O"
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102 - Top K Frequent words - top-k-frequent-words.txt

Hi, here's your problem today. This problem was recently asked by AirBNB:

Given a non-empty list of words, return the k most frequent words. The output should be sorted from highest to lowest frequency, and if two words have the same frequency, the word with lower alphabetical order comes first. Input will contain only lower-case letters.

Example:
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Top | Category: Computing | Comments (0) | Tags: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | English | 68259 Views, 29274 Search Bots | 102 Words