tatsuyax25

/**
 * @param {number} n
 * @return {number}
 */
var countLargestGroup = function(n) {
    // Map to store frequency of digit sum groups
    const countMap = {};
    let maxSize = 0, result = 0;

    // Loop through numbers from 1 to n

tatsuyax25

/**
 * @param {number} n
 * @param {number} maxValue
 * @return {number}
 */
// Define the modulo constant for operations
const MODULO = 10n ** 9n + 7n;

// Define the maximum value for calculations
const MAX_VALUE = 10000;

tatsuyax25

/**
 * This function calculates the number of valid arrays that can be reconstructed
 * from a given list of differences within a specified range.
 *
 * @param {number[]} differences - An array of differences between consecutive elements.
 * @param {number} lower - The lower bound of the valid range.
 * @param {number} upper - The upper bound of the valid range.
 * @return {number} - The number of valid arrays that can be reconstructed.
 */
var numberOfArrays = function(differences, lower, upper) {

tatsuyax25

/**
 * @param {number[]} answers
 * @return {number}
 */
var numRabbits = function(answers) {
      // Step 1: Create a frequency map to count occurrences of each answer
    const countMap = {};
    for (const answer of answers) {
        countMap[answer] = (countMap[answer] || 0) + 1;
    }

tatsuyax25

/**
 * Generates the nth element of the count-and-say sequence.
 *
 * @param {number} n - The position in the sequence (1-based index).
 * @return {string} - The nth element of the count-and-say sequence.
 */
var countAndSay = function(n) {
    // Validate the input: must be between 1 and 30 (inclusive)
    if (n < 1 || n > 30 || n == null) {
        return 'ERROR'; // Return an error if input is invalid

tatsuyax25

/**
 * @param {number[]} nums
 * @param {number} k
 * @return {number}
 */
var countPairs = function(nums, k) {
    // Initialize a counter to keep track of pairs that satisfy the conditions
    let count = 0;

    // Loop through all possible values of i (starting from index 0)

tatsuyax25

/**
 * Function to count the number of "good" subarrays in an array.
 * A "good" subarray is defined as having at least `k` pairs of indices `(i, j)`
 * such that `nums[i] == nums[j]` and `i < j`.
 *
 * @param {number[]} nums - Array of integers to be evaluated.
 * @param {number} k - Minimum number of pairs needed to consider a subarray "good".
 * @return {number} - The total count of "good" subarrays.
 */
var countGood = function(nums, k) {

tatsuyax25

/**
 * @param {number[]} nums1
 * @param {number[]} nums2
 * @return {number}
 */
// Class for Binary Indexed Tree (BIT), also known as Fenwick Tree
class BIT {
    constructor(size) {
        this.n = size; // Size of the BIT
        this.tree = new Array(size + 1).fill(0); // Initialize BIT array with zeros (1-based index)

tatsuyax25

/**
 * @param {number[]} arr
 * @param {number} a
 * @param {number} b
 * @param {number} c
 * @return {number}
 */
var countGoodTriplets = function(arr, a, b, c) {
    // Initialize a counter to track the number of good tripets
    let count = 0;

tatsuyax25

/**
 * @param {number} n
 * @return {number}
 */
// Define the modulo value to prevent overflow in calculations
const MOD = 1_000_000_007;

function modPow(base, exp, mod) {
    let result = 1n; // Initialize result as 1
    let b = BigInt(base), e = BigInt(exp), m = BigInt(mod); // Convert to BigInt for large numbers