Excel Sheet Column Title
2015-10-19 18:52
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题目名称
Excel Sheet Column Title—LeetCode链接
描述
Given a positive integer, return its corresponding column title as appear in an Excel sheet.
For example:
分析
考虑到字符A,B,······,Z对应的ASCII码为65,66,······,90,所以题目就编程十进制数转26进制数的问题了。因为数字是从1开始的,所以在转换的过程中要相应地减1。
C++代码
总结
遇到新题目时,如果可以转换成以前遇到过的类型就直接转换,这样会减少很多麻烦,以后可以多总结一下题型。
Excel Sheet Column Title—LeetCode链接
描述
Given a 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
分析
考虑到字符A,B,······,Z对应的ASCII码为65,66,······,90,所以题目就编程十进制数转26进制数的问题了。因为数字是从1开始的,所以在转换的过程中要相应地减1。
C++代码
class Solution { public: string convertToTitle(int n) { string res=""; while(n>0){ char c = (n-1)%26 + 65; res = c+res; n=(n-1)/26; } return res; } };
总结
遇到新题目时,如果可以转换成以前遇到过的类型就直接转换,这样会减少很多麻烦,以后可以多总结一下题型。
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