随笔分类 - LeetCode
摘要：Given a list of sorted characters letters containing only lowercase letters, and given a target letter target, find the smallest element in the list t
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摘要：There are N network nodes, labelled 1 to N. Given times, a list of travel times as directededges times[i] = (u, v, w), where u is the source node, v i
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摘要：Start from integer 1, remove any integer that contains 9 such as 9, 19, 29... So now, you will have a new integer sequence: 1, 2, 3, 4, 5, 6, 7, 8, 10
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摘要：Given a binary tree where every node has a unique value, and a target key k, find the value of the nearest leaf node to target k in the tree. Here, ne
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摘要：In a N x N grid representing a field of cherries, each cell is one of three possible integers. 0 means the cell is empty, so you can pass through; 1 m
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摘要：Given an array A (index starts at 1) consisting of N integers: A1, A2, ..., AN and an integer B. The integer Bdenotes that from any place (suppose the
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摘要：Given an array nums of integers, you can perform operations on the array. In each operation, you pick any nums[i] and delete it to earn nums[i] points
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摘要：Given a list of daily temperatures, produce a list that, for each day in the input, tells you how many days you would have to wait until a warmer temp
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摘要：Given a non-negative integer N, find the largest number that is less than or equal to N with monotone increasing digits. (Recall that an integer has m
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摘要：Given two sentences words1, words2 (each represented as an array of strings), and a list of similar word pairs pairs, determine if two sentences are s
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摘要：You are given a string expression representing a Lisp-like expression to return the integer value of. The syntax for these expressions is given as fol
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摘要：We are given an array asteroids of integers representing asteroids in a row. For each asteroid, the absolute value represents its size, and the sign r
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摘要：Given an array consisting of n integers, find the contiguous subarray whose length is greater than or equal to k that has the maximum average value. A
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摘要：Given two sentences words1, words2 (each represented as an array of strings), and a list of similar word pairs pairs, determine if two sentences are s
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摘要：Implement a MyCalendarThree class to store your events. A new event can always be added. Your class will have one method, book(int start, int end). Fo
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摘要：An image is represented by a 2-D array of integers, each integer representing the pixel value of the image (from 0 to 65535). Given a coordinate (sr,
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摘要：Implement a MyCalendarTwo class to store your events. A new event can be added if adding the event will not cause a triple booking. Your class will ha
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摘要：Given a string S, find the number of different non-empty palindromic subsequences in S, and return that number modulo 10^9 + 7. A subsequence of a str
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摘要：Implement a MyCalendar class to store your events. A new event can be added if adding the event will not cause a double booking. Your class will have
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摘要：A self-dividing number is a number that is divisible by every digit it contains. For example, 128 is a self-dividing number because 128 % 1 == 0, 128
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