Question: This problem has been solved! See the answer You are given three kinds of parenthesis expressions. Write a function that returns the longest balanced expression.

This problem has been solved!

See the answer

You are given three kinds of parenthesis expressions. Write a function that returns the longest balanced expression. Also write a function that checks whether the given expression is right or not. (Use stack c++)

Example 1:

input: (){}[]()()()[]

output: ()()()

Example 2:

input: ({)}{}[]

output: alignment is ok

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