Leetcode 171 Excel Sheet Column Number 字符串处理
本质是把26进制转化为10进制
A -> 1
B -> 2
C -> 3
...
Z -> 26
AA -> 27
AB -> 28
class Solution {
public:
int titleToNumber(string s) {
int ans = ;
for(int i = ; i<s.size(); ++i){
ans = * ans + s[i] - 'A' + ;
}
return ans;
}
};
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