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Gas Station (M) 题目 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 g 阅读全文
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Majority Element II (M) 题目 Given an integer array of size n, find all elements that appear more than ⌊ n/3 ⌋ times. Note: The algorithm should run in 阅读全文
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Car Pooling (M) 题目 You are driving a vehicle that has capacity empty seats initially available for passengers. The vehicle only drives east (ie. it ca 阅读全文
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Unique Paths III (H) 题目 On a 2-dimensional grid, there are 4 types of squares: 1 represents the starting square. There is exactly one starting square. 阅读全文
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Sequential Digits (M) 题目 An integer has sequential digits if and only if each digit in the number is one more than the previous digit. Return a sorted 阅读全文
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Best Time to Buy and Sell Stock (E) 题目 Say you have an array for which the \(i^{th}\) element is the price of a given stock on day i. If you were only 阅读全文
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Robot Bounded In Circle (M) 题目 On an infinite plane, a robot initially stands at (0, 0) and faces north. The robot can receive one of three instructio 阅读全文
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Maximum XOR of Two Numbers in an Array (M) 题目 Given a non-empty array of numbers, a0, a1, a2, … , an-1, where 0 ≤ ai < 231. Find the maximum result of 阅读全文
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Combination Sum III (M) 题目 Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 to 9 can be used and 阅读全文
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Maximum Product Subarray (M) 题目 Given an integer array nums, find the contiguous subarray within an array (containing at least one number) which has t 阅读全文