You are a software developer tasked with improving the syntax validation system for a code editor. One of your responsibilities is to ensure that all blocks of code within the editor have balanced curly brackets. Your goal is to determine the minimum number of reversals required to make an expression of curly brackets balanced. A balanced expression is one where each opening curly bracket '{' has a corresponding closing curly bracket '}', and all curly brackets are properly nested.To achieve this, write to write a program that uses a stack data structure to help identify and fix unbalanced expressions. Example 1Input: ([]{[]})Output: BalancedExplanation: The user inputs the expression "([]{[]})". The program checks whether the brackets are balanced or not. In this case, all the brackets are balanced, so it prints "Balanced" as the output.Example 2Input: (([{}])Output: Not BalancedExplanation: The user inputs the expression "(([{}])". The program checks whether the brackets are balanced or not. In this case, the closing brackets do not match the corresponding opening brackets, so it prints "Not Balanced" as the output.Input format :The input consists of a string representing the expression.Output format :The output should print either "Balanced" or "Not Balanced" based on the input expression.Refer to the sample output for the formatting specifications.Code constraints :Input expression includes only parentheses, curly brackets, and square bracketsSample test cases :Input 1 :([]{[]})Output 1 :BalancedInput 2 :(([{}])Output 2 :Not Balanced
Question
You are a software developer tasked with improving the syntax validation system for a code editor. One of your responsibilities is to ensure that all blocks of code within the editor have balanced curly brackets. Your goal is to determine the minimum number of reversals required to make an expression of curly brackets balanced. A balanced expression is one where each opening curly bracket '{' has a corresponding closing curly bracket '}', and all curly brackets are properly nested.To achieve this, write to write a program that uses a stack data structure to help identify and fix unbalanced expressions. Example 1Input: ([]{[]})Output: BalancedExplanation: The user inputs the expression "([]{[]})". The program checks whether the brackets are balanced or not. In this case, all the brackets are balanced, so it prints "Balanced" as the output.Example 2Input: (([{}])Output: Not BalancedExplanation: The user inputs the expression "(([{}])". The program checks whether the brackets are balanced or not. In this case, the closing brackets do not match the corresponding opening brackets, so it prints "Not Balanced" as the output.Input format :The input consists of a string representing the expression.Output format :The output should print either "Balanced" or "Not Balanced" based on the input expression.Refer to the sample output for the formatting specifications.Code constraints :Input expression includes only parentheses, curly brackets, and square bracketsSample test cases :Input 1 :([]{[]})Output 1 :BalancedInput 2 :(([{}])Output 2 :Not Balanced
Solution
Here is a step-by-step guide to solve this problem:
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Initialize an empty stack.
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Iterate through each character in the input string.
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If the character is an opening bracket ('(', '{', or '['), push it onto the stack.
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If the character is a closing bracket (')', '}', or ']'), then check the top of the stack.
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If the stack is empty, it means there is no matching opening bracket for the current closing bracket. So, the expression is not balanced.
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If the stack is not empty, compare the top of the stack with the current closing bracket. If they form a pair of matching brackets, pop the top element from the stack. If they do not form a pair, the expression is not balanced.
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Continue this process until all characters in the string have been processed.
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After processing all characters, if the stack is empty, it means all opening brackets had a matching closing bracket. So, the expression is balanced. If the stack is not empty, it means there are some opening brackets which did not have a matching closing bracket. So, the expression is not balanced.
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Print "Balanced" or "Not Balanced" based on the final condition of the stack.
Here is a Python code snippet that implements the above steps:
def isBalanced(expr):
stack = []
for char in expr:
if char in ["(", "{", "["]:
stack.append(char)
else:
if not stack:
return "Not Balanced"
current_char = stack.pop()
if current_char == '(':
if char != ")":
return "Not Balanced"
if current_char == '{':
if char != "}":
return "Not Balanced"
if current_char == '[':
if char != "]":
return "Not Balanced"
if stack:
return "Not Balanced"
return "Balanced"
print(isBalanced("([]{[]})")) # Balanced
print(isBalanced("(([{}])")) # Not Balanced
This code uses a stack to keep track of the opening brackets and checks for the corresponding closing brackets as it iterates through the expression. If it encounters a closing bracket without a matching opening bracket, or if there are any opening brackets left without a matching closing bracket after processing the entire expression, it returns "Not Balanced". Otherwise, it returns "Balanced".
Similar Questions
Given a string S consisting only of the opening and closing curly brackets '{' and '}' find out the minimum number of reversals required to make a balanced expression using stack.A Balanced Expression is one where Each ‘{‘ has a corresponding ‘ }’ and all curly brackets inside it are also balanced.ExamplesInput 1:{{}{{}Output 1:1Explanation:To balance the given expression, reverse one open bracket to a closed bracket (i.e. {{}}{} )to make it a balanced one, thus printing 1.Input 2:}}{}{}{}{{{}}Output 2:-1Explanation:The string's length is 13, which is an odd number; thus, print -1.Input format :The input consists of a string consisting of opening and closing curly brackets.Output format :The output prints the minimum reversals required to make S balanced.If the length of the string is odd, print -1. If it is already balanced, print 0.
Single File Programming QuestionProblem StatementYou are a software developer tasked with improving the syntax validation system for a code editor. One of your responsibilities is to ensure that all blocks of code within the editor have balanced curly brackets. Your goal is to determine the minimum number of reversals required to make an expression of curly brackets balanced. A balanced expression is one where each opening curly bracket '{' has a corresponding closing curly bracket '}', and all curly brackets are properly nested.To achieve this, write to write a program that uses a stack data structure to help identify and fix unbalanced expressions. Example 1Input: ([]{[]})Output: BalancedExplanation: The user inputs the expression "([]{[]})". The program checks whether the brackets are balanced or not. In this case, all the brackets are balanced, so it prints "Balanced" as the output.Example 2Input: (([{}])Output: Not BalancedExplanation: The user inputs the expression "(([{}])". The program checks whether the brackets are balanced or not. In this case, the closing brackets do not match the corresponding opening brackets, so it prints "Not Balanced" as the output.Input format :The input consists of a string representing the expression.Output format :The output should print either "Balanced" or "Not Balanced" based on the input expression.Refer to the sample output for the formatting specifications.Code constraints :Input expression includes only parentheses, curly brackets, and square bracketsSample test cases :Input 1 :([]{[]})Output 1 :BalancedInput 2 :(([{}])Output 2 :Not Balanced
Check for Balanced ParenthesesWrite a function that takes a string of parentheses and checks if the parentheses are balanced using a stack.Constraints:NAExample:Sample Input-1:(())Sample Output-1:trueSample Input-2:((Sample Output-2:falseExplanation:In both of these examples, parentheses must appear in a balanced fashion. Balanced parentheses means that each opening symbol has a corresponding closing symbol and the pairs of parentheses are properly nested.Public Test Cases:# INPUT EXPECTED OUTPUT1 (())true2 ((false
A sequence of parentheses is called balanced if it consists entirely of pairs of opening/closing parentheses (in that order), which is well nested. For example, sequences "(())()", "()" and "(()(()))" are balanced, while "(()" and "(()))(" are not. Write a program to determine if a given string contains a balanced sequence of parentheses. The input to the function balanced parentheses is a string str. Each character in the string will be "(" or ")". The output is the count of balanced pairs if the sequence is balanced or -1 otherwise. For example, if the input sequence is "(()(()))", the expected output is 4.
The data structure required to check whether an expression contains a balanced parenthesis is?
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