随笔分类 - Leetcode
摘要：An integer interval [a, b] (for integers a < b) is a set of all consecutive integers from a to b, including a and b. Find the minimum size of a set S
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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：970. Powerful Integers Given two non-negative integers x and y, an integer is powerful if it is equal to x^i + y^j for some integers i >= 0 and j >= 0
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摘要：121. Best Time to Buy and Sell Stock Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitte
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摘要：In the world of Dota2, there are two parties: the Radiant and the Dire. The Dota2 senate consists of senators coming from two parties. Now the senate
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摘要：There are n different online courses numbered from 1 to n. Each course has some duration(course length) t and closed on dth day. A course should be ta
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摘要：Given a char array representing tasks CPU need to do. It contains capital letters A to Z where different letters represent different tasks. Tasks coul
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摘要：There are a number of spherical balloons spread in two-dimensional space. For each balloon, provided input is the start and end coordinates of the hor
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摘要：Given a collection of intervals, find the minimum number of intervals you need to remove to make the rest of the intervals non-overlapping. Note: Exam
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摘要：Given a non-negative integer num represented as a string, remove k digits from the number so that the new number is the smallest possible. Note: The l
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摘要：Suppose you have a random list of people standing in a queue. Each person is described by a pair of integers (h, k), where h is the height of the pers
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摘要：A sequence of numbers is called a wiggle sequence if the differences between successive numbers strictly alternate between positive and negative. The
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摘要：Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to find the maximum profit. You may comple
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摘要：Given a sorted positive integer array nums and an integer n, add/patch elements to the array such that any number in range [1, n] inclusive can be for
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摘要：Given two arrays of length m and n with digits 0-9 representing two numbers. Create the maximum number of length k <= m + n from digits of the two. Th
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摘要：Given a string which contains only lowercase letters, remove duplicate letters so that every letter appear once and only once. You must make sure your
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摘要：There are N children standing in a line. Each child is assigned a rating value. You are giving candies to these children subjected to the following re
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摘要：There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a car with an unlimited gas tank and it cost
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摘要：Starting with an undirected graph (the "original graph") with nodes from 0 to N-1, subdivisions are made to some of the edges. The graph is given as f
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摘要：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 stations. Ea
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