[BOJ/JAVA] 백준 2504번 : 괄호의 값

2504번: 괄호의 값

 

 

 

 

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• 풀이

 

(이면 2, [이면 3으로 temp에 곱해주면서 닫힌괄호가 나올 시 temp를 더 해주고 닫힌 괄호의 값을 temp에서 다시 나눠주는 방식을 사용했다.

 

• 코드

 

import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.InputMismatchException;
import java.util.Stack;

public class Main {
	static String s;
	static int answer;

	public static void main(String[] args) throws Exception {
		SetData();
		System.out.println(answer);
	}

	// 데이터
	private static void SetData() throws Exception {
		InputReader in = new InputReader(System.in);

		s = in.nextLine();
		answer = 0;
		SaveAnswer();		
	}
	
	private static void SaveAnswer() {
		Stack<Integer> stack=new Stack<>();
		int temp=1;
		for (int i = 0; i < s.length(); i++) {
			if(s.charAt(i)=='(') {
				stack.add(2);
				temp*=2;
			}else if(s.charAt(i)=='[') {
				stack.add(3);
				temp*=3;
			}else {
				// 여는 괄호 X
				if(stack.size()==0) {
					answer=0;
					break;
				}
				
				// 여는 괄호 X && 닫는 괄호 X
				if(s.charAt(i)!=']' && s.charAt(i)!=')') {
					answer=0;
					break;
				}
				
				// 괄호 매칭 X
				if((s.charAt(i)==']' && stack.peek()==2) || (s.charAt(i)==')' && stack.peek()==3)) {
					answer=0;
					break;
				}

				if((s.charAt(i-1)=='(' && s.charAt(i) == ')') || (s.charAt(i-1)=='[' && s.charAt(i) == ']')) {
					answer+=temp;
				}
				temp/=stack.pop();
			}
			
		}
		
		if(stack.size()!=0) {
			answer=0;
		}
	}
}

class Node implements Comparable<Node> {
	long age;
	int index;

	public Node(long age, int index) {
		this.age= age;
		this.index = index;
	}

	@Override
	public int compareTo(Node o) {
		// TODO Auto-generated method stub
		return Long.compare(this.age, o.age);
	}
}

class InputReader {
	private final InputStream stream;
	private final byte[] buf = new byte[8192];
	private int curChar, snumChars;

	public InputReader(InputStream st) {
		this.stream = st;
	}

	public int read() {
		if (snumChars == -1)
			throw new InputMismatchException();
		if (curChar >= snumChars) {
			curChar = 0;
			try {
				snumChars = stream.read(buf);
			} catch (IOException e) {
				throw new InputMismatchException();
			}
			if (snumChars <= 0)
				return -1;
		}
		return buf[curChar++];
	}

	public int nextInt() {
		int c = read();
		while (isSpaceChar(c)) {
			c = read();
		}
		int sgn = 1;
		if (c == '-') {
			sgn = -1;
			c = read();
		}
		int res = 0;
		do {
			res *= 10;
			res += c - '0';
			c = read();
		} while (!isSpaceChar(c));
		return res * sgn;
	}

	public long nextLong() {
		int c = read();
		while (isSpaceChar(c)) {
			c = read();
		}
		int sgn = 1;
		if (c == '-') {
			sgn = -1;
			c = read();
		}
		long res = 0;
		do {
			res *= 10;
			res += c - '0';
			c = read();
		} while (!isSpaceChar(c));
		return res * sgn;
	}

	public int[] nextIntArray(int n) {
		int a[] = new int[n];
		for (int i = 0; i < n; i++) {
			a[i] = nextInt();
		}
		return a;
	}

	public String nextLine() {
		int c = read();
		while (isSpaceChar(c))
			c = read();
		StringBuilder res = new StringBuilder();
		do {
			res.appendCodePoint(c);
			c = read();
		} while (!isEndOfLine(c));
		return res.toString();
	}

	public boolean isSpaceChar(int c) {
		return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
	}

	private boolean isEndOfLine(int c) {
		return c == '\n' || c == '\r' || c == -1;
	}
}