LeetCode 171. Excel Sheet Column Number 解题报告
2016-09-30 16:20
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LeetCode 171. Excel Sheet Column Number 解题报告
题目描述
Given a column title as appear in an Excel sheet, return its corresponding column number.示例
限制条件
没有明确给出。解题思路
我的思路:
很简单的一道题,把字符串看成是一个26进制数,A-Z相当于1-26,那么直接按照进制转换的规则去做就行。比如ABC=1×262+2×261+3×260=731。代码
我的代码
class Solution { public: int titleToNumber(string s) { int number = 0; int power = 1; for (int i = s.length() - 1; i >= 0; i--) { number += power * (s[i] - 'A' + 1); power *= 26; } return number; } };
总结
这道题是水题,看出是一个进制转换的题目就好简单了,算是复习了一下进制转换的实现吧。国庆前一天填的第二个坑,今天这样,国庆假期加油吧↖(^ω^)↗。
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