异或^符号,在平时的学习时可能遇到的不多,不过有时使用得当可以发挥意想不到的结果. 值得注意的是,异或运算是建立在二进制基础上的,所有运算过程都是按位异或(即相同为0,不同为1,也称模二加),得到最终结果. 特点:任何数和0异或都等于它本身;两个相同的数异或后的结果是0: 举例如下: int a = 4 =100(二进制) int b = 3 =011(二进制) int c = a^b = 111 = 7: 下面就^常用应用做个介绍: 1. 在一排数中找到独一无二的一个数 本例启发来自于杭电oj…
import java.util.Arrays; import java.util.Scanner; //杭电oj 4004 //解题思路:利用二分法查找,即先选取跳跃距离的区间,从最大到最小, //然后去中值,并依次到judgeHigh函数判断是否满足条件,然后逐步逼近最终答案 public class Main { public static void main(String[] args) { Scanner in=new Scanner(System.in); while (in.has…
question:A+ B again 思路:额,没啥思路/捂脸,用java的long包里的方法,很简单,只是有几次WA,有几点要注意一下 注意:如果数字有加号要删除掉,这里用到了正则表达式“\\+”来匹配加号(我在自己的电脑里不用删除加号也可以通过,杭电oj上就过不了,必须要加这个……) source code: package hduoj; import java.util.Scanner; public class hdoj_2057 { public static void main(S…
杭电oj并没有反爬 所以直接爬就好了 直接贴源码(参数可改,循环次数可改,存储路径可改) import requests from bs4 import BeautifulSoup import time def write_in_file(number,string):#output function with open ('D:\\python\\python_code\\hdoj\\'+str(number)+".txt","a+",encoding='utf…
Quoit Design Problem Description Have you ever played quoit in a playground? Quoit is a game in which flat rings are pitched at some toys, with all the toys encircled awarded. In the field of Cyberground, the position of each toy is fixed, and the ri…
今天开始和一个认识的学弟刷题. 学弟是个大牛,我还是个菜鸟.嘿嘿. 杭电第一题我就wrong了好几次. #include <iostream> using namespace std; int main() { ,B = ; while(cin >> A >> B) { cout<< A + B << endl; } ; } #include <iostream> using namespace std; int main() { ,…
主题 Calculate a + b 杭电OJ-1000 Input Each line will contain two integers A and B. Process to end of file. Output For each case, output A + B in one line. Mine #include <stdio.h> int main() { int a,b; while(~scanf("%d %d",&a,&b)) //多次…
Monkey and Banana Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 6866 Accepted Submission(s): 3516 Problem Description A group of researchers are designing an experiment to test the IQ of a monkey…
Prime Ring Problem Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 23458 Accepted Submission(s): 10465 Problem Description A ring is compose of n circles as shown in diagram. Put natural numb…
What Is Your Grade? Problem Description “Point, point, life of student!” This is a ballad(歌谣)well known in colleges, and you must care about your score in this exam too. How many points can you get? Now, I told you the rules which are used in this co…
A + B Again Time Limit: 1000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 15358 Accepted Submission(s): 6700 Problem Description There must be many A + B problems in our HDOJ , now a new one is coming. Gi…
Starship Troopers Problem Description You, the leader of Starship Troopers, are sent to destroy a base of the bugs. The base is built underground. It is actually a huge cavern, which consists of many rooms connected with tunnels. Each room is occupie…