int isCongruent(string s, string c) { // write code here unordered_map<char, int>hash_s; unordered_map<char, int>hash_c; for (int i = 0; i < s.length(); i++) hash_s[s[i]]++; for (int i = 0; i < c.length(); i++) hash_c[c[i]]++; for (int i = 0; i < c.length(); i++){ if(hash_s[s[i]]!=hash_c[s[i]]) return -1; } return s.length(); }