摘要： Given an integer n, return the number of trailing zeroes in n!. Note: Your solution should be in logarithmic time complexity. 主要是思考清楚计算过程： 将一个数进行因式分解， 阅读全文

摘要： Related to question Excel Sheet Column Title Given a column title as appear in an Excel sheet, return its corresponding column number. For example: 很简 阅读全文

摘要： Design and implement a TwoSum class. It should support the following operations: add and find. Design and implement a TwoSum class. It should support 阅读全文

摘要： Given an array of size n, find the majority element. The majority element is the element that appears more than ⌊ n/2 ⌋ times. You may assume that the 阅读全文

摘要： Given a positive integer, return its corresponding column title as appear in an Excel sheet. For example: 26进制的实现。 没什么难点。就是需要需要注意是 n = (n-1)／26 阅读全文

摘要： Given an array of integers that is already sorted in ascending order, find two numbers such that they add up to a specific target number. The function 阅读全文

摘要： Given two integers representing the numerator and denominator of a fraction, return the fraction in string format. If the fractional part is repeating 阅读全文