题目 | Excel Sheet Column Number |
经过率 | 40.5% |
难度 | Easy |
Related to question Excel Sheet Column Titlejava
Given a column title as appear in an Excel sheet, return its corresponding column number.app
For example:spa
A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28
题目分析:处理26进制,逐个读入字符串的每个字符进行处理转换,逐个移位;
java代码:
public class Solution { public int titleToNumber(String s) { int i=0; int num=0; while(i<s.length()){ if(s.charAt(i)!='Z'){ num=num*26+s.charAt(i)-65+1; } else num=num*26+26; i++; } return num; } }