HackerRank Javascript solution— #31 Cut the sticks

Problem statement :

Cut the sticks | HackerRank

'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 cutTheSticks function below.
function cutTheSticks(arr) {
    let resultArr= [];
    while (arr.length != 0) {

       let min= Math.min(...arr);
        output.push(arr.length);
        for (let i = 0; i < arr.length; i++) {
            let subs= arr[i] - minVal;

            if (subs === 0) {
                arr.splice(i, 1);
                i -= 1;
            } else {
                arr[i] = subs;
            }
         }
    }
    return resultArr;
}

function main() {
    const ws = fs.createWriteStream(process.env.OUTPUT_PATH);

    const n = parseInt(readLine(), 10);

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

    let result = cutTheSticks(arr);

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

    ws.end();
}