leetcode

0 class Solution {

1 static int sum(int n) {

2 int res = 0;

3

4 while (n > 0) {

5 res += n % 10;

6 n /= 10;

7 }

8

9 return res;

10 }

11

12 public:

13 int getLucky(const string &s, int k) const {

14 int res = 0;

15

16 for (const char c : s)

17 res += sum(c - '`');

18 for (int i = 1; i < k; i++)

19 res = sum(res);

20

21 return res;

22 }

23 };