function workbook(n: number, k: number, arr: number[]): number {
    let usedPages = 0;
    let specialCount = 0;
    for (let i = 0; i < arr.length; i++) {
        const numOfQuestions = arr[i];
        const pagesNeeded = Math.ceil(numOfQuestions / k);
        for (let j = 0; j < pagesNeeded; j++) {
             const pageNum = usedPages + j + 1;
             const startIndex = j * k + 1;
             const endIndex = Math.min(startIndex + k - 1, numOfQuestions);
             if (pageNum >= startIndex && pageNum <= endIndex) {
                specialCount++;
             }
        } 
        usedPages += pagesNeeded;
    }
    return specialCount;
}