Java-100-Days-Coding-Challenge/Day 60.txt at main · Lakshman-Github/Java-100-Days-Coding-Challenge · GitHub

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import java.util.*;
class Main
{
    static String checkFlood(String str)
    {
        Stack<Character> parenthesis = new Stack<>();
        for(int i=0;i<str.length();i++)
        {
            switch(str.charAt(i))
            {
                case '(':
                case '<':
                case '{':
                case '[':

                        parenthesis.push(str.charAt(i));break;
                case ')': if(parenthesis.empty() || parenthesis.peek()!='(')
                            return "Flood";
                        else
                            parenthesis.pop();
                        break;
                case '>': if(parenthesis.empty() || parenthesis.peek()!='<')
                            return "Flood";
                        else
                            parenthesis.pop();
                        break;
                case '}': if(parenthesis.empty() || parenthesis.peek()!='{')
                          return "Flood";
                         else
                          parenthesis.pop();
                         break;
                case ']': if(parenthesis.empty() || parenthesis.peek()!='[')
                         return "Flood";
                        else
                         parenthesis.pop();
                        break;
            }
        }
        if(parenthesis.empty())
        return "No Flood";
        else
        return "Flood";
    }
public static void main(String args[])
{
    Scanner sc = new Scanner(System.in);
    String str = sc.nextLine();
    System.out.println(checkFlood(str));

}

}