168. Excel表列名称 #59

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swiftwind0405 opened this issue Jan 31, 2021 · 0 comments

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swiftwind0405 commented Jan 31, 2021 •

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方法一：递归

解题思想：
将输入转化为nums数组，num[1, 26]。
例如：
1 -> [1]
26 -> [26]
27 -> [1, 1]
52 -> [1, 26]
...

代码：

var convertToTitle = function(n) {
    const mod26 = (num) => {
        if (num <= 26) { return [num]; }
        if (num % 26 === 0) {
            return mod26((num / 26) -1).concat([26]);
        }
        return mod26(parseInt(num / 26)).concat([num % 26]);
    }
    return mod26(n).map(num => String.fromCharCode(num + 65 - 1)).join('');
};

复杂度分析：

时间复杂度：
空间复杂度：

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