| Excerpt |
|---|
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. |
An input string is valid if:
...
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| Excerpt |
|---|
Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the input string is valid. |
An input string is valid if:
...