yxy

# observable
# observer
# reaction
# derivation
import time
from typing import Callable
from collections import defaultdict


from attr import attrib, attrs

yxy

(function () {
  "use strict";

  var view, viewModel, valueTemplate;

  valueTemplate = {
    configurable: false,
    enumerable: true,
    get: function () {
      return this._value;

yxy

// N x repeated characters
const LEN = process.argv.length > 2 ? parseInt(process.argv[2]) : 4
console.log('LEN: ' + LEN)

function check(s) {
    let i = s.length - LEN
    const p = s.charAt(i)

    for (i++; i<s.length; i++) {
        if (p != s.charAt(i)) {