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题目如下： Given a non-negative integer num, return the number of steps to reduce it to zero. If the current number is even, you have to divide it by 2, ot 阅读全文
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题目如下： Given an array of integers arr and two integers k and threshold. Return the number of sub-arrays of size k and average greater than or equal to 阅读全文
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题目如下： Given two numbers, hour and minutes. Return the smaller angle (in sexagesimal units) formed between the hour and the minute hand. Example 1: Inp 阅读全文
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题目如下： Given an array arr of integers, check if there exists two integers N and M such that N is the double of M ( i.e. N = 2 * M). More formally check 阅读全文
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题目如下： Given two equal-size strings s and t. In one step you can choose any character of t and replace it with another character. Return the minimum nu 阅读全文
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题目如下： Implement the class TweetCounts that supports two methods: 1. recordTweet(string tweetName, int time) Stores the tweetName at the recorded time 阅读全文