类别归档：LeetCode

题目描述：

Given an integer n, return the number of trailing zeroes in n!.

Note: Your solution should be in polynomial time complexity.

题目大意：

给定一个整数n，返回n!（n的阶乘）数字中的后缀0的个数。

注意：你的解法应该满足多项式时间复杂度。

解题思路：

参考博文：http://www.geeksforgeeks.org/count-trailing-zeroes-factorial-number/

朴素解法：

首先求出n!，然后计算末尾0的个数。（重复÷10 ...

题目描述：

Related to question Excel Sheet Column Title

Given a column title as appear in an Excel sheet, return its corresponding column number.

For example:

    A -> 1
    B -> 2
    C -> 3
    ...
    Z -> 26
    AA -> 27 ...

题目描述：

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 array is non-empty and the majority element always exist ...

题目描述：

Given a non-zero positive integer, return its corresponding column title as appear in an Excel sheet.

For example:

    1 -> A
    2 -> B
    3 -> C
    ...
    26 -> Z
    27 -> AA
    28 -> AB 

题目大意：

给定一个正整数，返回其在Excel表格中对应的列标题 ...

题目描述：

Given two integers representing the numerator and denominator of a fraction, return the fraction in string format.

If the fractional part is repeating, enclose the repeating part in parentheses.

For example,

• Given numerator = 1, denominator = 2, return "0.5" ...