# 38. Count and Say

## Approach 1: Brute Force

Since there is a limit to what `n` can be, evaluating it will using brute force will still be safe and will not Time out

`class Solution:    def countAndSay(self, n):        """                :type n: int        :rtype: str        """        ans = ['1']        for i in range(n):            prev = '0'            count = 0            s = ''            for j in ans[i]:                if prev == '0':                     prev = j                    count = 1                elif j != prev:                    s += str(count)                    s += prev                    count = 1                    prev = j                else:                    count += 1            if count or prev:                s += str(count)                s += prev                count = 1                prev = j            ans.append(s)        return ans[n-1]`

Now that we are successfully able to find out the answer, we can easily just use our list `ans` and just return the required index number. Moreover since the range is of `n` is under 30, we can be sure that the memory won't be too much of a strain either. That is what I have adopted in Approach 2 as well

Time Complexity: O(n)

Space Complexity: O(n)

## Approach 2: Stored Brute Force

`class Solution:    def countAndSay(self, n):        """        https://leetcode.com/problems/count-and-say/description/        :type n: int        :rtype: str        """        return ['1', '11', '21', '1211', '111221', '312211', '13112221', '1113213211', '31131211131221', '13211311123113112211', '11131221133112132113212221', '3113112221232112111312211312113211', '1321132132111213122112311311222113111221131221', '11131221131211131231121113112221121321132132211331222113112211', '311311222113111231131112132112311321322112111312211312111322212311322113212221', '132113213221133112132113311211131221121321131211132221123113112221131112311332111213211322211312113211', '11131221131211132221232112111312212321123113112221121113122113111231133221121321132132211331121321231231121113122113322113111221131221', '31131122211311123113321112131221123113112211121312211213211321322112311311222113311213212322211211131221131211132221232112111312111213111213211231131122212322211331222113112211', '1321132132211331121321231231121113112221121321132122311211131122211211131221131211132221121321132132212321121113121112133221123113112221131112311332111213122112311311123112111331121113122112132113213211121332212311322113212221', '11131221131211132221232112111312111213111213211231132132211211131221131211221321123113213221123113112221131112311332211211131221131211132211121312211231131112311211232221121321132132211331121321231231121113112221121321133112132112312321123113112221121113122113121113123112112322111213211322211312113211', '311311222113111231133211121312211231131112311211133112111312211213211312111322211231131122211311122122111312211213211312111322211213211321322113311213212322211231131122211311123113223112111311222112132113311213211221121332211211131221131211132221232112111312111213111213211231132132211211131221232112111312211213111213122112132113213221123113112221131112311311121321122112132231121113122113322113111221131221', 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                   `

Time Complexity: O(1)

Space Complexity: O(n) or O(1) (since the upper bound for n is given)

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