103 - Detect Linked List Cycle - detect-linked-list-cycle.txt

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

Given a linked list, determine if the linked list has a cycle in it. For notation purposes, we use an integer pos which represents the zero-indexed position where the tail connects to.

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 | 68381 Views, 32987 Search Bots | 120 Words

104 - Plus One - plus-one.txt

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

Given a non-empty array where each element represents a digit of a non-negative integer, add one to the integer. The most significant digit is at the front of the array and each element in the array contains only one digit. Furthermore, the integer does not have leading zeros, except in the case of the number '0'.

Example:
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105 - Find Missing Numbers in an Array - find-missing-numbers-in-an-array.txt

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

Given an array of integers of size n, where all elements are between 1 and n inclusive, find all of the elements of [1, n] that do not appear in the array. Some numbers may appear more than once.

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 | 66418 Views, 33716 Search Bots | 84 Words

106 - Binary Tree Level with Minimum Sum - binary-tree-level-with-minimum-sum.txt

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

You are given the root of a binary tree. Find the level for the binary tree with the minimum sum, and return that value.

For instance, in the example below, the sums of the trees are 10, 2 + 8 = 10, and 4 + 1 + 2 = 7. So, the answer here should be 7.
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107 - Algorithm Interview: Lowest Common Ancestor of 2 Nodes in Binary Tree - lowest-common-ancestor-of-2-nodes-in-binary-tree.txt

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

You are given the root of a binary tree, along with two nodes, A and B. Find and return the lowest common ancestor of A and B. For this problem, you can assume that each node also has a pointer to its parent, along with its left and right child.

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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 | 76430 Views, 42080 Search Bots | 147 Words

108 - Algorithm Interview: Shifted String - shifted-string.txt

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

You are given two strings, A and B. Return whether A can be shifted some number of times to get B.

Eg. A = abcde, B = cdeab should return true because A can be shifted 3 times to the right to get B. A = abc and B= acb should return false.
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109 - Algorithm Interview: Level Order Traversal of Binary Tree - level-order-traversal-of-binary-tree.txt

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

Given the root of a binary tree, print its level-order traversal. For 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 | 75972 Views, 42278 Search Bots | 73 Words

110 - Algorithm Interview: Determine If Linked List is Palindrome - determine-if-linked-list-is-palindrome.txt

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

You are given a doubly linked list. Determine if it is a palindrome.

Can you do this for a singly linked list?
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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 | 74209 Views, 41451 Search Bots | 102 Words

111 - Algorithm Interview: Subarray With Target Sum - subarray-with-target-sum.txt

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

You are given an array of integers, and an integer K. Return the subarray which sums to K. You can assume that a solution will always exist.

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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 | 74824 Views, 35456 Search Bots | 63 Words

112 - Algorithm Interview: Longest Consecutive Sequence - longest-consecutive-sequence.txt

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

You are given an array of integers. Return the length of the longest consecutive elements sequence in the array.

For example, the input array [100, 4, 200, 1, 3, 2] has the longest consecutive sequence 1, 2, 3, 4, and thus, you should return its length, 4.
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113 - Algorithm Interview: Permutations of numbers - permutations-of-numbers.txt

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

You are given an array of integers. Return all the permutations of this array.

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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 | 76328 Views, 37458 Search Bots | 38 Words

114 - Algorithm Interview: Maximum Path Sum in Binary Tree - maximum-path-sum-in-binary-tree.txt

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

You are given the root of a binary tree. Find the path between 2 nodes that maximizes the sum of all the nodes in the path, and return the sum. The path does not necessarily need to go through the root.

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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 | 74681 Views, 46566 Search Bots | 116 Words

115 - Algorithm Interview: Smallest Number that is not a Sum of a Subset of List - smallest-number-that-is-not-a-sum-of-a-subset-of-list.txt

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

Given a sorted list of positive numbers, find the smallest positive number that cannot be a sum of any subset in the list.

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 | 72381 Views, 99751 Search Bots | 66 Words

116 - Algorithm Interview: Make the Largest Number - make-the-largest-number.txt

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

Given a number of integers, combine them so it would create the largest number.

Example:
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117 - Algorithm Interview: No Adjacent Repeating Characters - no-adjacent-repeating-characters.txt

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

Given a string, rearrange the string so that no character next to each other are the same. If no such arrangement is possible, then return None.

Example:
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118 - Algorithm Interview: String Compression - string-compression.txt

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

Given an array of characters with repeats, compress it in place. The length after compression should be less than or equal to the original array.

Example:
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119 - Algorithm Interview: Convert Roman Numerals to Decimal - convert-roman-numerals-to-decimal.txt

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

Given a Roman numeral, find the corresponding decimal value. Inputs will be between 1 and 3999.

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 | 74477 Views, 46755 Search Bots | 160 Words