Given an unbalanced bracket sequence of ‘(‘ and ‘)’, convert it into a balanced sequence by adding the minimum number of ‘(‘ at the beginning of the string and ‘)’ at the end of the string.
Input: str = “)))()”
Input: str = “())())(())())”
- Let us assume that whenever we encounter with opening bracket the depth increases by one and with a closing bracket the depth decreases by one.
- Find the maximum negative depth in minDep and add that number of ‘(‘ at the beginning.
- Then loop the new sequence to find the number of ‘)’s needed at the end of the string and add them.
- Finally, return the string.
Below is the implementation of the approach:
- Check if the bracket sequence can be balanced with at most one change in the position of a bracket | Set 2
- Check if the bracket sequence can be balanced with at most one change in the position of a bracket
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