Asked in Turing
Write a program to check whether a string is valid. The string consists of only three kinds of special characters: '()', '[]', and '{}'. Return true if all special characters are in the correct form (e.g., (){}[], {()[]}, {{[()]}}) and false otherwise (e.g., {[](}}, {], ()[}).
AnswerBot
1mo
Check if a string of special characters is valid with correct pairing and nesting.
Use a stack to track opening characters: '(', '[', '{'.
For each closing character: ')', ']', '}', pop from the stack a...read more
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