LeetCode: 171 Excel Sheet Column Number(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 -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28
代码:
1 class Solution { 2 public: 3 int titleToNumber(string s) { 4 int num = 0; 5 for (int i = 0; i < s.length(); i++) 6 { 7 char ch = s[i]; 8 num = num * 26 + (ch - ‘A‘ + 1); 9 } 10 11 return num; 12 } 13 };
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