2012年3月 冬コンテスト Problem A: Carpenter's Language [Licence: NYSL Version 0.9982]

Main.java

import java.util.*;
public class Main {
  public static void main(String...args) {
		Scanner sc = new Scanner(System.in);
		int q = sc.nextInt();
		long d = 0;
		for (int i = 0; i < q; i++) {
			sc.next();
			if (sc.next().charAt(0) == '(')
				d += sc.nextInt();
			else
				d -= sc.nextInt();
			System.out.println(d == 0 ? "Yes" : "No");
		}
	}
}