hackerrank_sample.js

process.stdin.resume();
process.stdin.setEncoding("ascii");
var input = "";
process.stdin.on("data", function (chunk) {
input += chunk;
});
process.stdin.on("end", function () {

    // mi codigo
    for (var i=0; i<input; i++){
        for (var j=0; j<input-i-1; j++) process.stdout.write(" ");
        for (var j=0; j<i+1; j++)       process.stdout.write("#");
        process.stdout.write("\n");
    }
    // fin de mi codigo
    
});