01 2020 档案
摘要：题目如下： Given an array of integers arr, replace each element with its rank. The rank represents how large the element is. The rank has the following rul
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摘要：题目如下： Given a m * n matrix mat of integers, sort it diagonally in ascending order from the top-left to the bottom-right then return the sorted array.
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摘要：题目如下： Given a palindromic string palindrome, replace exactly one character by any lowercase English letter so that the string becomes the lexicographi
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摘要：题目如下： Given a binary tree root and an integer target, delete all the leaf nodes with value target. Note that once you delete a leaf node with value ta
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摘要：题目如下： Given a string s. Return all the words vertically in the same order in which they appear in s.Words are returned as a list of strings, complete
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摘要：题目如下： Given a positive integer num consisting only of digits 6 and 9. Return the maximum number you can get by changing at most one digit (6 becomes 9
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摘要：题目如下： You have a keyboard layout as shown above in the XY plane, where each English uppercase letter is located at some coordinate, for example, the l
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摘要：题目如下： There are n computers numbered from 0 to n-1 connected by ethernet cables connections forming a network where connections[i] = [a, b] represents
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摘要：题目如下： Given 3 positives numbers a, b and c. Return the minimum flips required in some bits of a and b to make ( a OR b == c ). (bitwise OR operation).
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摘要：题目如下： Given an integer n. No-Zero integer is a positive integer which doesn't contain any 0 in its decimal representation. Return a list of two intege
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摘要：题目如下： Return the number of distinct non-empty substrings of text that can be written as the concatenation of some string with itself. Example 1: Input
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摘要：题目如下： Given a binary tree, return the sum of values of nodes with even-valued grandparent. (A grandparent of a node is the parent of its parent, if it
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摘要：题目如下： Given a m * n matrix mat and an integer K, return a matrix answer where each answer[i][j] is the sum of all elements mat[r][c] for i - K <= r <=
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摘要：题目如下： We are given a list nums of integers representing a list compressed with run-length encoding. Consider each adjacent pair of elements [a, b] = [
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摘要：题目如下： In the video game Fallout 4, the quest "Road to Freedom" requires players to reach a metal dial called the "Freedom Trail Ring", and use the dia
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摘要：题目如下： A car travels from a starting position to a destination which is target miles east of the starting position. Along the way, there are gas statio
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摘要：题目如下： Given a string s. In one step you can insert any character at any index of the string. Return the minimum number of steps to make s palindrome.
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摘要：题目如下： There are n people, each person has a unique id between 0 and n-1. Given the arrays watchedVideos and friends, where watchedVideos[i] and friend
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摘要：题目如下： Given a string s formed by digits ('0' - '9') and '#' . We want to map s to English lowercase characters as follows: Characters ('a' to 'i') are
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摘要：题目如下： Given an integer n, return any array containing n unique integers such that they add up to 0. Example 1: Example 2: Example 3: Constraints: 1 <=
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摘要：题目如下： Given two binary search trees root1 and root2. Return a list containing all the integers from both trees sorted in ascending order. Example 1: E
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摘要：题目如下： Given an array of non-negative integers arr, you are initially positioned at start index of the array. When you are at index i, you can jump to
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摘要：题目如下： Given n boxes, each box is given in the format [status, candies, keys, containedBoxes] where: status[i]: an integer which is 1 if box[i] is open
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