leetcode

0 class Solution {

1 public:

2 int maxLengthBetweenEqualCharacters(const string &s) const {

3 static int index[27];

4 int res = -1;

5 memset(index, 0xFF, sizeof(index));

6 for (int i = 0; i < s.size(); i++) {

7 const int idx = s[i] & 0x1F;

8 if (index[idx] == -1)

9 index[idx] = i;

10 else

11 res = max(res, i - index[idx] - 1);

12 }

13 return res;

14 }

15 };