Competitive programming

Contest Link import java.util.*; class Solution{     public static void main(String[] args){         Scanner sc = new Scanner(System.in);         int t = sc.nextInt();         while(t-->0){             String jewels = sc.next();             StringBuilder s = new StringBuilder();             s.append(jewels);             int count = 0;             while(true){                 int temp = 0;                 for(int i=0;i<s.length()-1;i++){                     if(s.charAt(i)==s.charAt(i+1)){                         count++;                 ...

Contest Link import java.io.*; import java.math.*; import java.security.*; import java.text.*; import java.util.*; import java.util.concurrent.*; import java.util.function.*; import java.util.regex.*; import java.util.stream.*; import static java.util.stream.Collectors.joining; import static java.util.stream.Collectors.toList; class Result { /* * Complete the 'maxXorValue' function below. * * The function is expected to return a STRING. * The function accepts following parameters: * 1. STRING x * 2. INTEGER k */ public static String maxXorValue(String x, int k) { StringBuilder s = new StringBuilder(); int n = 0; int i = 0; for(i=0;i<x.length();i++){ if(n<k){ if(x.charAt(i)=='0'){ s.append('1'); n += 1; } else{ s.append('0'); } ...

Contest Link import java.util.*; class Solution{ public static void main(String[] args){ Scanner sc = new Scanner(System.in); String s = sc.next(); StringBuilder res = new StringBuilder(""); boolean isPressed = false; int count = 0; boolean cursorStart = false; ArrayList<Character> c = new ArrayList<>(); for(int i=0;i<10;i++){ c.add((char)i); } for(int i=0;i<s.length();i++){ if(s.charAt(i)=='<'){ res = res.reverse(); cursorStart = true; continue; } else if(s.charAt(i)=='>'){ if(cursorStart == true){ res = res.reverse(); cursorStart = false; } continue; } else if(s.charAt(i)=='*'){ res.delete(res.length()-1, res.length()); ...

Question Link import java.io.*; import java.math.*; import java.security.*; import java.text.*; import java.util.*; import java.util.concurrent.*; import java.util.regex.*; public class Solution {     static class SinglyLinkedListNode {         public int data;         public SinglyLinkedListNode next;         public SinglyLinkedListNode(int nodeData) {             this.data = nodeData;             this.next = null;         }     }     static class SinglyLinkedList {         public SinglyLinkedListNode head;         public SinglyLinkedListNode tail;         public SinglyLinkedList() {  ...

Sieve of Eratosthenis Algorithm:- 1. Create a list of consecutive integers from 2 to n: (2, 3, 4, …, n). 2. Initially, let p equal 2, the first prime number. 3. Starting from p2, count up in increments of p and mark each of these numbers greater than or equal to p2 itself in the list.    These numbers will be p(p+1), p(p+2), p(p+3), etc.. 4. Find the first number greater than p in the list that is not marked. If there was no such number, stop.     Otherwise, let p now equal this number (which is the next prime), and repeat from step 3. <-->  When the algorithm terminates, all the numbers in the list that are not marked false are prime.  If you want the code for it then comment down.

IDE stands for Integrated Development Environment. An IDE consists of a text editor to write the code, a console to view the output, a compiler at backend to process (i.e. compile and run) the code and several necessary buttons to compile, run, etc. Here are some of the IDEs to start with various programming languages :- 1. C, C++ :-   CLion ,  DevC++ , CodeBlocks , TurboC++ . 2. Java :-   Eclipse ,  IntelliJ IDEA ,  NetBeans ,  BlueJ . 3. Python :-   PyCharm ,  Spyder . There are some editors which can be used to compile and run the code of many languages by downloading extensions. Some of them are :- Sublime Text ,  Notepad++ ,  Visual Studio Code ,  Atom etc. Top computer books

BigInteger class in java BigInteger class in java comes with the java.math package. This class is used to store numbers which are beyond the capacity of other data types. If we want to store a number of 180 digits, it cannot be stored in another data type. So, BigInteger class is used to store these values. Implementation of BigInteger class in java :-  import java.math.BigInteger; class Main{     public static void main(String[] args){         BigInteger b = new BigInteger("1");         int n = 20;         for(int i=1;i<=n;i++){             b = b.multiply(BigInteger.valueOf(i));         }         System.out.println(f);     } } This program will print the factorial of 20 using BigInteger. Top computer books