Re: [閒聊] 每日leetcode

[dont (dont)]

1945. Sum of Digits of String After Convert

## 思路

第1輪把字元都轉成數字再加總digit
第2~k輪就digit加總

## Code

```python
class Solution:
    def getLucky(self, s: str, k: int) -> int:
        res = 0
        for ch in s:
            pos = ord(ch) - ord('a') + 1
            res += pos // 10 + pos % 10

        for _ in range(1, k):
            curr = 0
            while res:
                res, digit = divmod(res, 10)
                curr += digit
            res = curr

        return res
```

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