Leetcode----------Excel Sheet Column Title

Topic	Excel Sheet Column Title
Pass Rate	17.2%
Difficulty	Easy

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

For example:

    1, A    2, B    3, C    ...    AA, Z        

Excel Sheet column title and Excel Sheet column number is exactly the two inverse of the topic, in fact, is the conversion between 10 binary and 26 binary;
Idea:%26 each number to get that number, and then take N/26 to an integer, as long as the n>0 has been cycled, and special attention needs to be given to the case of Z (that is, divisible by 26);

Java code:

 Public classSolution { PublicString Converttotitle (intN) {StringBuilder sb=NewStringBuilder (); if(n<0)returnsb.tostring ();  while(n>0){            intX=n%26; if(x==0) {sb.append (Z); N--; }Else{sb.append (Char) (' A ' -1+x)); } N/=26; }        returnsb.reverse (). toString (); }}

Leetcode----------Excel Sheet Column Title