# 205. Isomorphic Strings

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

## solution

```python
class Solution:
    def isIsomorphic(self, s: str, t: str) -> bool:
        dict = {}

        if len(s) != len(t):
            return False

        for i, j in zip(s, t):
            if i != j:
                if i not in dict:
                    dict[i] = j
                else:
                    if dict[i] != j:
                        return False
            else:
                dict[i] = j
        return True
```

时间复杂度：O()\
空间复杂度：O()
