problem6.js

//https://www.hackerrank.com/challenges/lisa-workbook/

// Complete the workbook function below.
function workbook(n, k, arr) {
	let noOfPages,
		specialProblem = 0;
	for (let i = 0; i < arr.length; i++) {
		const chapter = arr[i];
		if (chapter <= k) {
			noOfPages = noOfPages + 1;
			if (noOfPages <= chapter) {
				specialProblem = specialProblem + 1;
			}
		} else {
			let pagesPerChapter = Math.floor(chapter / k);
			const remains = chapter - pagesPerChapter * k;
			if (remains > 0) {
				pagesPerChapter = pagesPerChapter + 1;
			}
			const arrChapter = Array.from({ length: chapter }, (v, key) => key + 1);
			for (let j = 0; j < pagesPerChapter; j++) {
				noOfPages = noOfPages + 1;
				const getProblems = arrChapter.slice(j * k, j * k + k);
				const special = getProblems.includes(noOfPages);
				if (special) {
					specialProblem = specialProblem + 1;
				}
			}
		}
	}
	return specialProblem;
}