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Question Given an array of integers and an integer k, find out whether there are two distinct indices i and j in the array such that nums[i] = nums[j] 阅读全文
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Question Given a positive integer n and you can do operations as follow: If n is even, replace n with n/2. If n is odd, you can replace n with either 阅读全文
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Question You are given coins of different denominations and a total amount of money amount. Write a function to compute the fewest number of coins tha 阅读全文