Hacker Rank - Desafio Staircase

staircase.js

process.stdin.resume();
process.stdin.setEncoding('ascii');

var input_stdin = "";
var input_stdin_array = "";
var input_currentline = 0;

process.stdin.on('data', function (data) {
    input_stdin += data;
});

process.stdin.on('end', function () {
    input_stdin_array = input_stdin.split("\n");
    main();    
});

function readLine() {
    return input_stdin_array[input_currentline++];
}

/////////////// ignore above this line ////////////////////

function main() {
    var n = parseInt(readLine());
    const insertSpace = (max) => Array.from({length:max - 1}).map(char => " ").join("")
    const insertHash = (max) => Array.from({length:max + 1}).map(char => "").join("#") + "\n"
  
    const solve = (times) => Array.from({length:times}).map((_, i) => insertSpace(times - i) + insertHash(i + 1)).join("")
   
    console.log(solve(n))

}