lisa-workbook.js

'use strict';

const fs = require('fs');

process.stdin.resume();
process.stdin.setEncoding('utf-8');

let inputString = '';
let currentLine = 0;

process.stdin.on('data', inputStdin => {
    inputString += inputStdin;
});

process.stdin.on('end', _ => {
    inputString = inputString.replace(/\s*$/, '')
        .split('\n')
        .map(str => str.replace(/\s*$/, ''));

    main();
});

function readLine() {
    return inputString[currentLine++];
}

// Complete the workbook function below.
function workbook(n, k, arr) {
    let answer = 0;
    let page = 1;
    let i = 0;
    while (i < n) {
        for(var index = 1; index <= arr[i]; ++index) {
            if(index == page)
                answer++;
            if(index == arr[i] || index % k == 0)
                ++page;
        }
        i++;
    }
    console.log("count", answer);
    return answer;
}
function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    const nk = readLine().split(' ');

    const n = parseInt(nk[0], 10);

    const k = parseInt(nk[1], 10);

    const arr = readLine().split(' ').map(arrTemp => parseInt(arrTemp, 10));

    let result = workbook(n, k, arr);

    ws.write(result + "\n");

    ws.end();
}