题解 | #游戏任务标记#

import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);

        while(in.hasNext()){
            // solution1(in);
            solution2(in);
        }
    }

    /**
     * 模拟法: 位运算
     * 简化
     * @param in
     */
    private static void solution2(Scanner in){
        int setupID = in.nextInt();
        int checkID = in.nextInt();

        int result;
        if((1<=setupID&&setupID<=1024) && (1<=checkID&&checkID<=1024)){
            int[] tasks = new int[32];
            int m,n;

            // unset
//            m = (setupID-1)>>5;
//            n = (setupID-1)&31;
//            tasks[m] &= ~(1<<n);
            
            // setup
            m = (setupID-1)>>5;
            n = (setupID-1)&31;
            tasks[m] |= (1<<n);

            // check
            m = (checkID-1)>>5;
            n = (checkID-1)&31;
            result = (tasks[m]&(1<<n))>>>n;
        }else{
            result = -1;
        }

        System.out.println(result);
    }

    /**
     * 模拟法: 位运算
     * @param in
     */
    private static void solution1(Scanner in){
        int setupID = in.nextInt();
        int checkID = in.nextInt();

        int result;
        if((1<=setupID&&setupID<=1024) && (1<=checkID&&checkID<=1024)){
            int[] tasks = new int[32];
            int m,n;

            // setup
            m = (setupID-1)/32;
            n = (setupID-1)%32;
            tasks[m] |= (1<<n);

            // check
            m = (checkID-1)/32;
            n = (checkID-1)%32;
            result = (tasks[m]&(1<<n))>>>n;
        }else{
            result = -1;
        }

        System.out.println(result);
    }
}