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摘要： Given a 32-bit signed integer, reverse digits of an integer. Note:Assume we are dealing with an environment which could only store integers within the 阅读全文

摘要： Write a program that outputs the string representation of numbers from 1 to n. But for multiples of three it should output “Fizz” instead of the numbe 阅读全文

摘要： Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, such that there is a bijection between a lette 阅读全文

摘要： Given two strings s and t , write a function to determine if t is an anagram of s. Example 1: Note:You may assume the string contains only lowercase a 阅读全文

摘要： Given a string, determine if it is a palindrome, considering only alphanumeric characters and ignoring cases. Note: For the purpose of this problem, w 阅读全文

摘要： Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. An input string is valid if: No 阅读全文