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摘要： 题目： Write a program to find the n-th ugly number. Ugly numbers are positive numbers whose prime factors only include 2, 3, 5. For example, 1, 2, 3, 4, 阅读全文

摘要： 题目：Given a sorted array consisting of only integers where every element appears twice except for one element which appears once. Find this single elem 阅读全文