Programming Challenges and Solutions
FizzBuzz
public class FizzBuzz {
public static void main(String[] args) {
for (int i = 1; i <= 100; i++) {
if (i % 3 == 0 && i % 5 == 0) {
System.out.println("FizzBuzz");
} else if (i % 3 == 0) {
System.out.println("Fizz");
} else if (i % 5 == 0) {
System.out.println("Buzz");
} else {
System.out.println(i);
}
}
}
}
Factorial
public class Factorial {
public static int calculateFactorial(int n) {
if (n == 0 || n == 1) {
return 1;
} else {
return n * calculateFactorial(n - 1);
}
}
public static void main(String[] args) {
int number = 5; // Replace with the desired number
int factorial = calculateFactorial(number);
System.out.println("Factorial of " + number + " is: " + factorial);
}
}
Fibonacci Sequence
public class Fibonacci {
public static void generateFibonacci(int n) {
int a = 0, b = 1;
System.out.print("Fibonacci Sequence (" + n + " terms): ");
for (int i = 1; i <= n; i++) {
System.out.print(a + " ");
int sum = a + b;
a = b;
b = sum;
}
}
public static void main(String[] args) {
int terms = 10; // Replace with the desired number of terms
generateFibonacci(terms);
}
}
Palindrome Checker
public class Palindrome {
public static boolean isPalindrome(String str) {
str = str.replaceAll("[^a-zA-Z0-9]", "").toLowerCase();
int left = 0;
int right = str.length() - 1;
while (left < right) {
if (str.charAt(left) != str.charAt(right)) {
return false;
}
left++;
right--;
}
return true;
}
public static void main(String[] args) {
String input = "A man, a plan, a canal, Panama!";
boolean result = isPalindrome(input);
System.out.println("Is palindrome: " + result);
}
}
Prime Number Generator
public class PrimeNumberGenerator {
public static boolean isPrime(int num) {
if (num <= 1) {
return false;
}
for (int i = 2; i <= Math.sqrt(num); i++) {
if (num % i == 0) {
return false;
}
}
return true;
}
public static void generatePrimes(int limit) {
System.out.println("Prime numbers up to " + limit + ":");
for (int i = 2; i <= limit; i++) {
if (isPrime(i)) {
System.out.print(i + " ");
}
}
}
public static void main(String[] args) {
int limit = 50; // Replace with the desired limit
generatePrimes(limit);
}
}
String Reversal
public class StringReversal {
public static String reverseString(String str) {
StringBuilder reversed = new StringBuilder();
for (int i = str.length() - 1; i >= 0; i--) {
reversed.append(str.charAt(i));
}
return reversed.toString();
}
public static void main(String[] args) {
String input = "Hello, World!";
String reversed = reverseString(input);
System.out.println("Reversed string: " + reversed);
}
}
Count Characters
public class CharacterCounter {
public static void countCharacters(String str) {
int[] counts = new int[256]; // Assuming ASCII characters
for (char c : str.toCharArray()) {
counts[c]++;
}
for (int i = 0; i < 256; i++) {
if (counts[i] > 0) {
System.out.println((char) i + ": " + counts[i]);
}
}
}
public static void main(String[] args) {
String input = "programming";
countCharacters(input);
}
}
Anagram Checker
public class AnagramChecker {
public static boolean areAnagrams(String str1, String str2) {
if (str1.length() != str2.length()) {
return false;
}
int[] counts = new int[256]; // Assuming ASCII characters
for (char c : str1.toCharArray()) {
counts[c]++;
}
for (char c : str2.toCharArray()) {
if (counts[c] == 0) {
return false;
}
counts[c]--;
}
return true;
}
public static void main(String[] args) {
String str1 = "listen";
String str2 = "silent";
boolean result = areAnagrams(str1, str2);
System.out.println("Are anagrams: " + result);
}
}
public class LargestSmallest {
public static void findLargestSmallest(int[] arr) {
if (arr.length == 0) {
System.out.println("Array is empty.");
return;
}
int smallest = arr[0];
int largest = arr[0];
for (int num : arr) {
if (num < smallest) {
smallest = num;
}
if (num > largest) {
largest = num;
}
}
System.out.println("Smallest: " + smallest);
System.out.println("Largest: " + largest);
}
public static void main(String[] args) {
int[] numbers = {10, 5, 23, 87, 2, 45};
findLargestSmallest(numbers);
}
}
Binary to Decimal
public class BinaryToDecimal {
public static int binaryToDecimal(String binary) {
int decimal = 0;
int power = 0;
for (int i = binary.length() - 1; i >= 0; i--) {
if (binary.charAt(i) == '1') {
decimal += Math.pow(2, power);
}
power++;
}
return decimal;
}
public static void main(String[] args) {
String binary = "110110";
int decimal = binaryToDecimal(binary);
System.out.println("Binary " + binary + " is decimal " + decimal);
}
}
Explore these challenges to sharpen your coding skills and learn new techniques. Each solution comes with a detailed explanation to help you understand the concepts behind the code.
Remember, consistent practice is key to becoming a proficient programmer. Have fun tackling these challenges and expanding your coding horizons!
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Я боялся, что потерял свои биткоины, но этот инструмент помог мне их вернуть.
Сначала я сомневался, что что-то получится, но удобный алгоритм удивил меня.
Благодаря специальным технологиям, платформа нашла утерянные данные.
Всего за несколько шагов я смог вернуть свои BTC.
Инструмент действительно работает, и я рекомендую его тем, кто потерял доступ к своим криптоактивам.
https://forum.auto-china.com/showthread.php?tid=32
Thank you for your comment! If you need to get in touch, you can reach us at:
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