https://leetcode.com/problems/isomorphic-strings

Source

    bool isIsomorphic(string s, string t) {
        unordered_map<char, char> hashST;
        unordered_map<char, char> hashTS;
        bool isIsmp = true;
        for (int i = 0; i < s.size(); ++i) {
            const char c1 = s[i];
            const char c2 = t[i];
            if ((hashST.find(c1) == std::end(hashST)) && (hashTS.find(c2) == std::end(hashTS))) {
                hashST[c1] = c2;
                hashTS[c2] = c1;
            } else if (hashST[c1] == c2) {
                // Do nothing
            } else {
                isIsmp = false;
                break;
            }
        }
        return isIsmp;
    }

GitHub

• IsomorphicStrings