33 - 每日算法题: 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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34 - 每日算法题: 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 | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | 英文 | 66414 次阅读, 33714 次搜索 | 84 个单词

35 - 每日算法题: 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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36 - 算法题 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 | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python,  | 英文 | 76427 次阅读, 42079 次搜索 | 147 个单词

37 - 算法题 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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38 - 算法题 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 | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python,  | 英文 | 75970 次阅读, 42278 次搜索 | 73 个单词

39 - 算法题 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 | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | 英文 | 74209 次阅读, 41449 次搜索 | 102 个单词

40 - 算法题 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 | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python,  | 英文 | 74824 次阅读, 35456 次搜索 | 63 个单词

41 - 算法题 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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Top | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | 英文 | 74379 次阅读, 35954 次搜索 | 69 个单词

42 - 算法题 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 | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python,  | 英文 | 76326 次阅读, 37457 次搜索 | 38 个单词

43 - 算法题 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 | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python,  | 英文 | 74679 次阅读, 46566 次搜索 | 116 个单词

44 - 算法题 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 | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | 英文 | 72379 次阅读, 99749 次搜索 | 66 个单词

45 - 算法题 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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Top | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | 英文 | 72882 次阅读, 35649 次搜索 | 41 个单词

46 - 算法题 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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Top | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | 英文 | 74064 次阅读, 29507 次搜索 | 57 个单词

47 - 算法题 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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Top | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | 英文 | 76113 次阅读, 32020 次搜索 | 87 个单词

48 - 算法题 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 | 类别: 计算机科学 | 评论 (0) | 标签: 每日算法题, 算法, 数据结构, 面试题, Daily Interview Problem, Data Structures and Algorithms, Computer Programming, Python, | 英文 | 74473 次阅读, 46754 次搜索 | 160 个单词