import java.util.*; public class Main { public static int n, m; public static boolean ok(int x, int y) { return x >= 0 && x < n && y >= 0 && y < m; } public static void main(String[] args) { Scanner sc = new Scanner(System.in); int T = sc.nextInt(); for(int id = 1; id <= T; id++) { int sx, sy, tx = 0, ty = 0; n = sc.nextInt(); m = sc.nextInt(); sx = sc.nextInt() - 1; sy = sc.nextInt() - 1; char[][] g = new char[n][]; int[][][] dis = new int[n][m][2]; for(int i = 0; i < n; i++) { g[i] = sc.next().toCharArray(); for(int j = 0; j < m; j++) { if(g[i][j] == 'E') { g[i][j] = '_'; tx = i; ty = j; } dis[i][j][0] = -1; dis[i][j][1] = -1; } } Queue<int[]> q = new LinkedList<>(); q.add(new int[]{sx, sy, 0}); dis[sx][sy][0] = 0; int[] dx = {0, 0, 1, -1}; int[] dy = {1, -1, 0, 0}; while(!q.isEmpty()) { int x = q.peek()[0]; int y = q.peek()[1]; int z = q.peek()[2]; q.poll(); for(int i = 0; i < 4; i++) { int nx = x + dx[i], ny = y + dy[i]; if(!ok(nx, ny)) continue; if(g[nx][ny] == '_') { if(dis[nx][ny][z] == -1) { dis[nx][ny][z] = dis[x][y][z] + 1; q.add(new int[]{nx, ny, z}); } } else if(z == 0) { while(ok(nx, ny) && g[nx][ny] == 'X') { if(dis[nx][ny][1] == -1) { dis[nx][ny][1] = dis[x][y][0] + 1; q.add(new int[]{nx, ny, 1}); } nx += dx[i]; ny += dy[i]; } } } } int ans = -1; if(dis[tx][ty][0] != -1) ans = dis[tx][ty][0]; if(dis[tx][ty][1] != -1 && (ans == -1 || ans > dis[tx][ty][1])) ans = dis[tx][ty][1]; System.out.println("#" + id + " " + ans); } } }

米哈游笔试题目-Java方向.docx

public static void main(String[] args) throws InterruptedException { ProducerConsumerDemo demo = new ProducerConsumerDemo(); Thread producerThread = new Thread(demo::produce); Thread consumer...

Java编写掷骰子游戏共4页.pdf.zip

public static void main(String[] args) { Random random = new Random(); int diceCount = 2; // 假设是两个骰子 int[] diceResults = new int[diceCount]; for (int i = 0; i ; i++) { diceResults[i] = ...

import java.util.*; public class CenterTree { public static final int N = 5; // 中心树加上最近的四个点一共有5个点 public static void main(String[] args) { // 从控制台读取中心点坐标 Scanner scanner = new Scanner(System.in); System.out.print("请输入中心点

} } /** * 判断一个下标是否已经被使用 */ private static boolean isIndexUsed(int index, int[] indices) { for (int i = 0; i < indices.length; i++) { if (indices[i] == index) { return true; } } return ...

import java.util.; import java.lang.; public class Main{ public static void main(String[] args){ Scanner scanner =new Scanner(System.in); while(scanner.hasNext()){ int n=scanner.nextInt(); int a=0; for(int i=2;i<=n/2;i++){ if(SuShu(i)){ if(SuShu(n-i)){ a=i; } } } System.out.println(a); System.out.println(n-a); } } //判断质数的方法 public static boolean SuShu(int n){ for(int i=2;i<=Math.sqrt(n);i++){ if(n%i==0){ return false; } } return true; } }转为c语言代码

1. 替换了 java.util 和 java.lang 包为 stdio.h 和 math.h 头文件。 2. 替换了 Scanner 输入操作为 scanf 函数。 3. 替换了 System.out.println 输出操作为 printf 函数。 4. 移除了 hasNext() 方法，使用 EOF 检查...

import java.util.stream.IntStream; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int a = in.nextInt(); int b = in.nextInt(); int[] r = IntStream.range(a, b). filter( ). toArray(); for ( int x : r ) { System.out.print(x+" "); } System.out.println(); in.close(); } }

public static boolean isPerfect(int n) { int sum = 0; for (int i = 1; i <= n / 2; i++) { if (n % i == 0) { sum += i; } } return sum == n; } } 这段代码中，我们将 isPerfect() 方法定义为...

package step1; import java.util.ArrayList; import java.util.Iterator; import java.util.List; import java.util.Scanner; public class Client { public static void main(String[] args) { List products = new ArrayList<String>(); Scanner scanner = new Scanner(System.in); int nums = scanner.nextInt(); for (int i = 0; i < nums; i++) { products.add(scanner.next()); } /****** Begin */ ///请用java自带的iterator实现products的正向遍历访问 /** End */ System.out.println("--------------------"); /** Begin */ ///请用自定义的iterator实现products的反向遍历访问 / End ***/ } }

public static void main(String[] args) { List<String> products = new ArrayList(); Scanner scanner = new Scanner(System.in); int nums = scanner.nextInt(); for (int i = 0; i ; i++) { products.add...

import java.math.BigInteger;import java.util.ArrayList;import java.util.List;import java.util.Random;public class PrimitiveRoot { public static int findPrimitiveRoot(int p) { List<Integer> factors = factorize(p - 1); // 计算 p-1 的质因数 Random rand = new Random(); while (true) { int candidate = rand.nextInt(p - 2) + 2; // 随机选取一个 a boolean isPrimitiveRoot = true; for (int factor : factors) { BigInteger exp = BigInteger.valueOf((p - 1) / factor); BigInteger res = BigInteger.valueOf(candidate).modPow(exp, BigInteger.valueOf(p)); if (res.equals(BigInteger.ONE)) { isPrimitiveRoot = false; break; } } if (isPrimitiveRoot) { return candidate; } } } private static List<Integer> factorize(int n) { List<Integer> factors = new ArrayList<>(); for (int i = 2; i <= Math.sqrt(n); i++) { while (n % i == 0) { factors.add(i); n /= i; } } if (n > 1) { factors.add(n); } return factors; } public static void main(String[] args) { int p = 2147483647; int primitiveRoot = findPrimitiveRoot(p); System.out.println("The primitive root of " + p + " is " + primitiveRoot); }}解释代码

这段代码是用Java实现计算一个质数p的原根。具体实现过程如下： 1. 首先调用factorize函数对p-1进行质因数分解，得到p-1的所有质因数。 2. 然后使用随机数选取一个介于2到p-1之间的整数作为候选的原根。 3. 对于p...

package five; import java.util.*; public class five { public static void main(String args[]) { Random r1=new Random(); Random r2=new Random(); boolean b=r1.nextBoolean();//随机数术为0时取真值 int i1=r1.nextInt(100); int i2=r2.nextInt(100); double d1=r1.nextDouble();//产生人丁等T0.0小丁1.0的随机数 double d2=r2.nextDouble(); System.out.println(b);System.out.println(i1);System.out.println(i2);System.out.println(d1);System.out.println(d2); } }

这是一个Java程序，主要演示了如何使用Random类生成随机数。程序创建了两个Random对象r1和r2，并使用它们生成不同类型的随机数。具体来说，程序使用nextBoolean方法生成一个布尔值，使用nextInt方法生成一个0到99...

import java.util.Arrays; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int[] positions = new int[n]; for (int i = 0; i < n; i++) { positions[i] = sc.nextInt(); } int m = sc.nextInt(); System.out.println(getResult(n, positions, m)); } public static int getResult(int n, int[] positions, int m) { Arrays.sort(positions); int min = 1, max = positions[n - 1] - positions[0]; int ans = 0; while (min <= max) { int mid = (min + max) >> 1; if (check(positions, m, mid)) { ans = mid; min = mid + 1; } else { max = mid - 1; } } return ans; } public static boolean check(int[] positions, int m, int minDis) { int count = 1; int curPos = positions[0]; for (int i = 1; i < positions.length; i++) { if (positions[i] - curPos >= minDis) { count++; curPos = positions[i]; } } return count >= m; } }把这段Java代码转成C++

int getResult(int n, vector<int>& positions, int m) { sort(positions.begin(), positions.end()); int minDis = 1; int maxDis = positions[n - 1] - positions[0]; int ans = 0; while (minDis ) { int...

import java.util.Arrays; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int n = sc.nextInt(); int[] positions = new int[n]; for (int i = 0; i < n; i++) { positions[i] = sc.nextInt(); } int m = sc.nextInt(); System.out.println(getResult(n, positions, m)); } public static int getResult(int n, int[] positions, int m) { Arrays.sort(positions); int min = 1, max = positions[n - 1] - positions[0]; int ans = 0; while (min <= max) { int mid = (min + max) >> 1; if (check(positions, m, mid)) { ans = mid; min = mid + 1; } else { max = mid - 1; } } return ans; } public static boolean check(int[] positions, int m, int minDis) { int count = 1; int curPos = positions[0]; for (int i = 1; i < positions.length; i++) { if (positions[i] - curPos >= minDis) { count++; curPos = positions[i]; } } return count >= m; } }把这段Java代码转成C++

int getResult(int n, vector<int>& positions, int m) { sort(positions.begin(), positions.end()); int minDis = 1; int maxDis = positions[n - 1] - positions[0]; int ans = 0; while (minDis ) { int...

解说这个代码import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner input = new Scanner(System.in); int n = input.nextInt(); int[][] a = new int[n][n]; boolean flag = true; for (int i = 0; i < n; i++) { for (int j = 0; j < n; j++) { a[i][j] = input.nextInt(); if (j < i && a[i][j] != 0) { flag = false; } } } if (flag) { System.out.println("YES"); } else { System.out.println("NO"); } }}

代码中，首先通过 Scanner 类获取用户输入的整数 n，表示矩阵的大小为 n x n。然后创建一个 n x n 的数组 a 来存储矩阵元素。接着，用一个布尔型变量 flag 来表示矩阵是否为下三角矩阵。默认情况下，flag 为 true...

import java.util.*; public class Date { private int year; private int month; private int day; public Date(int year, int month, int day) { this.year = year; this.month = month; this.day = day; } public int getDayOfYear() { int[] daysOfMonth = { 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334 }; int dayOfYear = daysOfMonth[month - 1] + day; if (isLeapYear() && month > 2) { dayOfYear++; } return dayOfYear; } public boolean isLeapYear() { if (year % 4 == 0) { if (year % 100 == 0) { return year % 400 == 0; } else { return true; } } else { return false; } } public static void main(String[] args) { Scanner scan = new Scanner(System.in); int year = scan.nextInt(); int month = scan.nextInt(); int day = scan.nextInt(); Date date = new Date(year, month, day); System.out.println(date.getDayOfYear()); } }报错：Main.java:3: error: class Date is public, should be declared in a file named Date.java public class Date { ^ 1 error，修改代码

你需要将 Date 类保存到一个名为 Date.java 的文件中，并在 Main.java 中使用它。在 Main.java 文件中，你可以使用 import 语句来导入 Date 类。下面是修改后的代码： Date.java 文件： java ...

import java.util.; import java.math.; public class Main{ static int MAXN=(int)(1e6+10); static boolean judge(int a,int b) {//判断奇异局势 double epa=(1+Math.sqrt(5.0))/2.0; if(a>b) { a^=b; b^=a; a^=b; } int k=b-a; if((int)(k*epa)==a)//奇异局势 return true; return false; } public static void main(String[] args) { Scanner cin=new Scanner(System.in); while(cin.hasNext()) { int a=cin.nextInt(); int b=cin.nextInt(); if(a==0&&b==0) break; if(judge(a,b)) { System.out.println(0); continue; } System.out.println(1); int i=a,j=b; while(i>=0&&j>=0) { i--;j--; if(judge(i,j)) System.out.println(i+" "+j); } i=a;j=b; while(i>=0) { i--; if(judge(i,j)) System.out.println(i+" "+j); } if(a==b) continue; i=a;j=b; while(j>=0) { j--; if(judge(i,j)) System.out.println(j+" "+i); } } cin.close(); }解释每一行什么意思 }

2. public class Main{ 定义一个公共类 Main，其中包含了 main 函数。 3. static int MAXN=(int)(1e6+10); 定义一个 MAXN 常量，表示最大的数字范围，这里取 $10^6+10$。 4. static boolean judge(int ...

import java.io. ; import java.net.; import java.util. *; public class EchoServer{ public static void main(String[] args) throws IOException {new EchoServerThread().start();}} class EchoServerThread extends Thread{ protected DatagramSocket socket = null; protected BufferedReader in = null; protected boolean hasMoreWork = true; protected int number = 0;//访问计数变量 public EchoServerThread() throws IOException{ this("EchoServerThread"); } public EchoServerThread(String name) throws IOException{ super(name); socket = new DatagramSocket(4248); public void run(){ while (hasMoreWork) { try{ byte[] buf = new byte[256];//接收应答 DatagramPacket packet = new DatagramPacket(buf, buf.length); socket.receive(packet); //创建应答 String dString = null; number++; dString ="Hi!你是第"+ number + "个访问者!"; buf = dString.getBytes();//将应答发送给端口和地址为"address""port"的客户 InetAddress address = packet.getAddress(); int port = packet.getPort(); packet = new DatagramPacket(buf, buf.length, address, port); socket.send(packet); }catch (IOException e){ e.printStackTrace(); hasMoreWork = false; } } socket.close();} } }哪里出错了

public static void main(String[] args) throws IOException { new EchoServerThread().start(); } } class EchoServerThread extends Thread { protected DatagramSocket socket = null; protected ...

构造一个Puppy类，该类有一个age变量保存年龄，name变量存放名字，逻辑类型的变量male表示性别（true表示性别为male，否则为female），可以通过getter方法进行访问。该类具有setAge、getAge、getName和isMale方法。请阅读和分析裁判测试程序样例和输入输出样例，完成Puppy类的代码。裁判测试程序样例： import java.util.Scanner; public class Main { public static void main(St

public class Puppy { private int age; private String name; private boolean male; public void setAge(int age) { this.age = age; } public int getAge() { return age; } public void setName...

以下JAVA代码哪里出错了？import java.util.Arrays; import java.util.Scanner; import static java.lang.Math.*; public class Main { public static void main(String[] args) { Scanner scanner =new Scanner(System.in); int n =scanner.nextInt(); int[][] place = new int[2][3]; int[][] data = new int[n+1][3]; double[][] result = new double[n+1][2]; int res=0; int sum=0; boolean v=true; for(int i=1;i<2;i++) { for(int j=1;j<3;j++) { place[i][j]=scanner.nextInt(); } } for(int i=1;i<n+1;i++) { for(int j=1;j<3;j++) { data[i][j]=scanner.nextInt(); } } for(int i=1;i<n+1;i++) { result[i][1]= Math.sqrt(Math.pow(data[i][1]-place[1][1],2)+Math.pow(data[i][2]-place[1][2],2)); } for(int i=1;i<n+1;i++) { System.out.println(result[i][1]); } Arrays.sort(result); for(int i=1;i<n+1;i++) { System.out.println(result[i][1]); } }

答案：根据您提供的代码，可能出现的错误是...2. 在声明data数组时，应为 int[n][3]，而不是 int[n 1][3]；3. 在声明result数组时，应为 double[n][2]，而不是 double[n 1][2]；4. 在循环中，i的初始值应为0，而不是1。

package 作业; import java.util.Scanner; public class seven { public static void main(String[] args) { Scanner input = new Scanner(System.in); boolean playAgain = true; while (playAgain) { int numberToGuess = (int) (Math.random() * 10); int numberOfTries = 3; System.out.println("猜数开始，你一共有 " + numberOfTries + " 次机会。"); for (int i = 0; i < numberOfTries; i++) { System.out.print("请输入你的猜想："); int guess = input.nextInt(); if (guess == numberToGuess) { System.out.println("恭喜你，回答正确！"); break; } else { System.out.println("猜错了！"); } } System.out.print("是否继续游戏？（Y/N）"); String playAgainInput = input.next(); playAgain = playAgainInput.equalsIgnoreCase("Y"); if (!playAgain) { System.out.println("游戏结束。"); } } } }

这是一个猜数字游戏的Java程序，程序会随机生成一个0-9之间的数字，玩家需要在3次机会内猜中这个数字。如果猜中，程序会输出恭喜你回答正确，游戏结束；如果猜错，程序会输出猜错了，让玩家继续猜。游戏结束后，程序...

优化这段代码 import java.util.ArrayList; import java.util.Arrays; import java.util.Scanner; import java.util.TreeSet; /** * @Author 陈平安 * @Date 2022/8/29 9:25 * @PackageName:PACKAGE_NAME * @ClassName: Main * @Description: TODO * @Version 1.0 */ public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int n = scanner.nextInt(); int[] arr = new int[n]; // int m = scanner.nextInt(); //获取数据 // int sum = 0;///每组的和 // TreeSet map = new TreeSet();//利用其具有自动排序的功能 // ArrayList<Integer> list = new ArrayList<>();//储存待测数据 for (int j = 0; j < arr.length; j++) { // list.add(scanner.nextInt()); arr[j] = scanner.nextInt(); }//for循环获取数据 // scanner.close(); // System.out.println(Arrays.toString(arr)); int count = 0; for (int i = 0; i < arr.length - 1; i++) { for (int j = 0; j < arr.length - 1 - i; j++) { if (arr[j] > arr[j + 1]) { count++; int temp = arr[j]; arr[j] = arr[j + 1]; arr[j + 1] = temp; } } } System.out.print(count); //System.out.println(list.toString()); // for (int j = 0; j < list.size() - m+1; j++) {//遍历数据元素，记得要加一，因为临界条件的值也有用处 // //******+1 // //System.out.println(j+" j"); // for (int k = j; k < j + m; k++) { // // sum += list.get(k); // } // map.add(sum); // // sum = 0; // sum = 0;//每m组循环以后记得置为空 // } // System.out.println(map.first());//第一个元素就是最小值 } }

public static void main(String[] args) { Scanner scanner = new Scanner(System.in); int n = scanner.nextInt(); int[] arr = new int[n]; for (int j = 0; j < arr.length; j++) { arr[j] = scanner....

import java.util.; import java.io.; class Main { static final double eps = 1e-10; static int n; static Point[] P = new Point[10000 + 5]; static class Point { double x, y; int id; public Point() {} public Point(double x, double y, int id) { this.x = x; this.y = y; this.id = id; } } static int dcmp(double x) { if (Math.abs(x) < eps) return 0; return x < 0 ? -1 : 1; } static class Vector { double x, y; public Vector(double x, double y) { this.x = x; this.y = y; } } static Vector minus(Point A, Point B) { return new Vector(A.x - B.x, A.y - B.y); } static double Cross(Vector A, Vector B) { return A.x * B.y - A.y * B.x; } static boolean cmp(Point A, Point B) { return dcmp(Cross(minus(A, P[0]), minus(B, P[0]))) < 0; } public static void main(String[] args) { Scanner sc = new Scanner(System.in); while (sc.hasNext()) { n = sc.nextInt(); P[0] = new Point(sc.nextDouble(), sc.nextDouble(), 1); for (int i = 1; i < n; ++i) { P[i] = new Point(sc.nextDouble(), sc.nextDouble(), i + 1); if (P[i].x < P[0].x || (P[i].x == P[0].x && P[i].y < P[0].y)) swap(P, 0, i); } Arrays.sort(P, 1, n, Main::cmp); System.out.println(P[0].id + " " + P[n / 2].id); } } static void swap(Point[] P, int i, int j) { Point temp = P[i]; P[i] = P[j]; P[j] = temp; } }的计算复杂度

该程序的计算复杂度为 O(nlogn)，其中 n 是点的个数。这是因为该程序使用了排序算法，对除了第一个点之外的其它点进行了排序，排序算法的时间复杂度为 O(nlogn)。同时，程序还进行了一些简单的数学计算和数组操作，...

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import java.util.*; public class CenterTree { public static final int N = 5; // 中心树加上最近的四个点一共有5个点 public static void main(String[] args) { // 从控制台读取中心点坐标 Scanner scanner = new Scanner(System.in); System.out.print("请输入中心点

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