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- using System;
- using System.Collections.Generic;
- using System.Linq;
- namespace P08BalancedParetheses
- {
- class Program
- {
- static void Main(string[] args)
- {
- var input = Console.ReadLine();
- var bracketsStack = new Stack<char>();
- var isBalanced = true;
- if (input.Length % 2 == 0)
- {
- for (int i = 0; i < input.Length; i++)
- {
- var currentChar = input[i];
- if (currentChar == '(' ||
- currentChar == '[' ||
- currentChar == '{')
- {
- bracketsStack.Push(currentChar);
- }
- else if (currentChar == ')' ||
- currentChar == ']' ||
- currentChar == '}')
- {
- if (currentChar == ')' && bracketsStack.Peek() == '(')
- {
- bracketsStack.Pop();
- }
- else if (currentChar == ']' && bracketsStack.Peek() == '[')
- {
- bracketsStack.Pop();
- }
- else if (currentChar == '}' && bracketsStack.Peek() == '{')
- {
- bracketsStack.Pop();
- }
- else
- {
- isBalanced = false;
- break;
- }
- }
- }
- }
- else
- {
- isBalanced = false;
- }
- if (isBalanced)
- {
- Console.WriteLine("YES");
- }
- else
- {
- Console.WriteLine("NO");
- }
- }
- }
- }
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