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Tech With Liang
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LeetCode 657: Robot Return to Origin
There is a robot starting at the position (0, 0), the origin, on a 2D plane. Given a sequence of its moves, judge if this
LeetCode 136: Single Number
Given a non-empty array of integers nums, every element appears twice except for one. Find that single one.
You must implement a solution with a
LeetCode 34: Find First and Last Position of Element in Sorted Array
Given an array of integers nums sorted in non-decreasing order, find the starting and ending position of a given target value.
If target is not
LeetCode 200: Number of Islands
Given an m x n 2D binary grid grid which represents a map of ‘1’s (land) and ‘0’s (water), return the number of islands.
An
LeetCode 881: Boats to Save People
You are given an array people where people[i] is the weight of the ith person, and an infinite number of boats where each boat can
LeetCode 278: First Bad Version
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
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