Data-Structures---Algorithms/Balanced Brackets at main · uditbhaskar21/Data-Structures---Algorithms · GitHub

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import java.io.*;
import java.util.*;

public class Main {

    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String str = sc.nextLine();
        Stack<Character> st = new Stack<>();
        for (int i=0;i<str.length();i++){
            char ch = str.charAt(i);
            if (ch == '(' || ch=='{' || ch=='['){
                    st.push(ch);
            }else if (ch==')'){
                boolean val = bracket(st,'(');
                if (val==false){
                    System.out.println(val);
                    return;
                }
            }else if (ch=='}'){
                boolean val = bracket(st,'{');
                if (val==false){
                    System.out.println(val);
                    return;
                }
            }else if (ch==']'){
                boolean val =  bracket(st,'[');
                if (val==false){
                    System.out.println(val);
                    return;
                }
            }else {

            }

        }
        if (st.size()==0){
            System.out.println("true");
        }else {
            System.out.println("false");
        }
    }
    public static Boolean bracket(Stack<Character> st,char cch){
        if (st.size()==0){
        return false;
        }
        else if (st.peek() != cch ){
            return false;
        }else {
            st.pop();
            return true;
        }
    }


}