给你一个整数 columnNumber
,返回它在 Excel 表中相对应的列名称。
例如:
A -> 1 B -> 2 C -> 3 ... Z -> 26 AA -> 27 AB -> 28 ...
示例 1:
输入:columnNumber = 1 输出:"A"
示例 2:
输入:columnNumber = 28 输出:"AB"
示例 3:
输入:columnNumber = 701 输出:"ZY"
示例 4:
输入:columnNumber = 2147483647 输出:"FXSHRXW"
提示:
1 <= columnNumber <= 231 - 1
class Solution:
def convertToTitle(self, columnNumber: int) -> str:
res = []
while columnNumber:
columnNumber -= 1
res.append(chr(ord('A') + columnNumber % 26))
columnNumber //= 26
return ''.join(res[::-1])
class Solution {
public String convertToTitle(int columnNumber) {
StringBuilder res = new StringBuilder();
while (columnNumber != 0) {
--columnNumber;
res.append((char) ('A' + columnNumber % 26));
columnNumber /= 26;
}
return res.reverse().toString();
}
}
function convertToTitle(columnNumber: number): string {
let res: string[] = [];
while (columnNumber > 0) {
--columnNumber;
let num: number = columnNumber % 26;
res.unshift(String.fromCharCode(num + 65));
columnNumber = Math.floor(columnNumber / 26);
}
return res.join('');
}
public class Solution {
public string ConvertToTitle(int columnNumber) {
StringBuilder res = new StringBuilder();
while (columnNumber != 0) {
--columnNumber;
res.Append((char) ('A' + columnNumber % 26));
columnNumber /= 26;
}
return new string(res.ToString().Reverse().ToArray());
}
}