leetcode

0 class Solution {

1 public:

2 int minNumberOfFrogs(const string &croakOfFrogs) const {

3 static const string word = "croak";

4 int count[5] = {0}, frogs = 0, res = 0;

5

6 for (const char c : croakOfFrogs) {

7 const int idx = word.find(c);

8 if (idx == 0)

9 res = max(res, ++frogs);

10 else if (!count[idx - 1]--)

11 return -1;

12 else if (idx == 4)

13 frogs--;

14 count[idx]++;

15 }

16

17 return !frogs ? res : -1;

18 }

19 };