leetcode

0 class Solution {

1 public:

2 string licenseKeyFormatting(const string &s, int k) const {

3 const int n = std::count(begin(s), end(s), '-');

4 const int m = size(s) - n;

5

6 string res;

7 int goal = m % k ? m % k + 1 : k + 1;

8 for (const char c : s) {

9 if (c == '-') continue;

10 if (!--goal) res += '-', goal = k;

11

12 res += toupper(c);

13 }

14

15 return res;

16 }

17 };