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Given an array of integers nums sorted in ascending order, find the starting and ending position of a given target value. If target is not found in th 阅读全文
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You are given an integer array height of length n. There are n vertical lines drawn such that the two endpoints of the ith line are (i, 0) and (i, hei 阅读全文
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You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the quality c 阅读全文
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Given an integer array nums, find the contiguous subarray (containing at least one number) which has the largest sum and return its sum. A subarray is 阅读全文
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Given an array of intervals intervals where intervals[i] = [starti, endi], return the minimum number of intervals you need to remove to make the rest 阅读全文
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You are given an array of non-overlapping intervals intervals where intervals[i] = [starti, endi] represent the start and the end of the ith interval 阅读全文
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Given an array of intervals where intervals[i] = [starti, endi], merge all overlapping intervals, and return an array of the non-overlapping intervals 阅读全文
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Given an array of meeting time intervals intervals where intervals[i] = [starti, endi], return the minimum number of conference rooms required. Exampl 阅读全文
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Given an array of meeting time intervals where intervals[i] = [start, end], determine if a person could attend all meetings. Example 1: Input: interva 阅读全文
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We are playing the Guess Game. The game is as follows: I pick a number from 1 to n. You have to guess which number I picked. Every time you guess wron 阅读全文
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Given a sorted array of distinct integers and a target value, return the index if the target is found. If not, return the index where it would be if i 阅读全文
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Given two strings s and t, determine if they are isomorphic. Two strings s and t are isomorphic if the characters in s can be replaced to get t. All o 阅读全文
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Given a string s1, we may represent it as a binary tree by partitioning it to two non-empty substrings recursively. Below is one possible representati 阅读全文
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Given an array of integers citations where citations[i] is the number of citations a researcher received for their ith paper, return compute the resea 阅读全文
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We define the Perfect Number is a positive integer that is equal to the sum of all its positive divisors except itself. Now, given an integer n, write 阅读全文
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You are given two integer arrays nums1 and nums2, sorted in non-decreasing order, and two integers m and n, representing the number of elements in num 阅读全文
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Given an integer array nums, move all 0's to the end of it while maintaining the relative order of the non-zero elements. Note that you must do this i 阅读全文
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Given an array of integers nums containing n + 1 integers where each integer is in the range [1, n] inclusive. There is only one repeated number in nu 阅读全文
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Count the number of prime numbers less than a non-negative number, n. Example 1: Input: n = 10 Output: 4 Explanation: There are 4 prime numbers less t 阅读全文
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Write a program to find the n-th ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. Example: Input: n = 10 Outpu 阅读全文