205.同构字符串
题目链接
205. 同构字符串 - 力扣(LeetCode)
完整代码
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39
   | class Solution { public:     bool isIsomorphic(string s, string t) {         string ss;         string st;         int hash[255];         int index=0;         memset(hash, 0, sizeof(hash));         for(int i=0;i<s.size();i++){             if(hash[int(s[i])]==0)             {                 index++;                 hash[int(s[i])]=index;                 ss.push_back(index+'0');             }else{                 ss.push_back(hash[int(s[i])]+'0');             }         }         index=0;         memset(hash, 0, sizeof(hash));         for(int i=0;i<t.size();i++){             if(hash[int(t[i])]==0)             {                 index++;                 hash[int(t[i])]=index;                 st.push_back(index+'0');             }else{                 st.push_back(hash[int(t[i])]+'0');             }         }         int ans = ss.compare(st);         if(ans==0){             return true;         }else{             return false;         }         return true;     } };
 
  | 
参考代码

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
   | class Solution { public:     bool isIsomorphic(string s, string t) {         unordered_map<char, char> s2t;         unordered_map<char, char> t2s;         int len = s.length();         for (int i = 0; i < len; ++i) {             char x = s[i], y = t[i];             if ((s2t.count(x) && s2t[x] != y) || (t2s.count(y) && t2s[y] != x)) {                 return false;             }             s2t[x] = y;             t2s[y] = x;         }         return true;     } };
 
  | 
参考链接
同构字符串 - 同构字符串 - 力扣(LeetCode)