Excel Sheet Column Title (Easy)

Description

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

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For example:

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

Analysis

简单题

My Solution

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//C++
class Solution {
public:
    string convertToTitle(int n) {
        string ans;
        while(n){
            if(n%26==0){
                ans+='Z';
                n/=26;n--;
                continue;
            }
            ans+=n%26-1+'A';
            n/=26;
        }
        reverse(ans.begin(),ans.end());
        return ans;
    }
};