LeetCode: 168. Excel Sheet Column Title
LeetCode: 168. Excel Sheet Column Title
题目描述
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
...Example 1:
Input: 1
Output: "A"Example 2:
Input: 28
Output: "AB"Example 3:
Input: 701
Output: "ZY"解题思路
进制转换。本题实际是将十进制数转换为 26 进制数。
AC 代码
class Solution {
public:
string convertToTitle(int n) {
string ans;
while(n)
{
ans.push_back((n-1)%26+'A');
n = (n-1)/26;
}
reverse(ans.begin(), ans.end());
return ans;
}
};