function fibonacci(n) {  if (n <= 1) return n;  return fibonacci(n - 1) + fibonacci(n - 2);}function debounce(func, delay) {  let timeoutId;  return (...args) => {    clearTimeout(timeoutId);    timeoutId = setTimeout(() => func(...args), delay);  };}const memoize = (fn) => {  const cache = new Map();  return (...args) => {    const key = JSON.stringify(args);    if (cache.has(key)) return cache.get(key);    const result = fn(...args);    cache.set(key, result);    return result;  };};