Leetcode || Count and Say

LeetCode数说序列生成

最新推荐文章于 2020-04-03 01:01:57 发布

sjtu_chenchen

最新推荐文章于 2020-04-03 01:01:57 发布

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分类专栏： java技术数据结构算法 leetcode 文章标签： leetcode

本文链接：https://blog.youkuaiyun.com/sjtu_chenchen/article/details/49718391

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本文介绍了LeetCode中Count and Say问题的解决方法，详细解析了数说序列的生成过程，例如1 -> 11 -> 21 -> 1211 -> 111221，并给出如何根据给定整数n生成数说序列的思路。

The count-and-say sequence is the sequence of integers beginning as follows:
1, 11, 21, 1211, 111221, …

1 is read off as “one 1” or 11.
11 is read off as “two 1s” or 21.
21 is read off as “one 2, then one 1” or 1211.
Given an integer n, generate the nth sequence.

package pack;

class Solution {
   
   
    public String countAndSay(int n) {
        if(n == 0)     
            return null;
        String

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Leetcode原题Count and Say count-and-say序列是整数序列，前五个术语如下： 1. 1 2. 11 3. 21 1211 5. 111221 1被读作“1”或11。 11被读作“两个1”或21。 21被读作“一个2，然后一个1”或1211。给定整数n，其中1≤n≤30，生成count-and-say序列的第n项。注意：整数序列的每个术语将表示为一个字符串。

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