Largest Substring Between Two Equal Characters.cpp

class Solution {
public:
    int maxLengthBetweenEqualCharacters(string s) {
        vector<int> v(26, -1);
        int maxi = -1;
        
        for (int i = 0; i < s.size(); i++) {
            if (v[s[i] - 'a'] == -1) v[s[i] - 'a'] = i;
            else maxi = max(maxi, abs(v[s[i] - 'a'] - i) - 1);      
        }
        
        return maxi;
    }
};