Leetcode题解 171. Excel Sheet Column Number
2016-04-15 17:51
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Given a column title as appear in an Excel sheet, return its corresponding column number.
For example:
26进制，简单题。
稍微有点难的地方就是这个26进制是从1开始的，而我们通常的机制是从0开始的，仔细思考一下就懂了。
For example:
A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28
26进制，简单题。
稍微有点难的地方就是这个26进制是从1开始的，而我们通常的机制是从0开始的，仔细思考一下就懂了。
public static int titleToNumber(String s) {
int result = 0;
for (int i = 0; i < s.length(); i++) {
result += (s.charAt(i) - 64) * Math.pow(26, s.length() - i - 1);
}
return result;
}
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