Leet Code OJ 171. Excel Sheet Column Number [Difficulty: Easy]
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题目:
Related to question Excel Sheet Column Title
Given a column title as appear in an Excel sheet, return its corresponding column number.
For example:
A -> 1B -> 2C -> 3...Z -> 26AA -> 27AB -> 28
翻译:
关联问题:“Excel Sheet Column Title”
给定一个类似Excel里面的列标题,返回它的列数值。
分析:
先将单个字母转换为数字,问题就转化为26进制的数转10进制的数。
代码:
public class Solution { public int titleToNumber(String s) { char[] arr=s.toCharArray(); int sum=0; for(char c:arr){ int num=c-'A'+1; if(num<=26&&num>0){ sum=sum*26+num; } } return sum; }}
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