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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#define fx for(i = 0; i < x; i++)
#define fy for(j = 0; j < y; j++)
#define nl printf("\n");
#define apc ap[j * x + i]
#define dc int i, j;

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class Singleton(object):
    _instance = None

    def __new__(cls, *args, **kwargs):
        if not cls._instance:
            cls._instance = super(Singleton, cls).__new__(cls, *args, **kwargs)
        return cls._instance

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class Allergen(models.Model):
    name = models.CharField(max_length=256, null=False, blank=False)

class Ingredient(models.Model):
    name = models.CharField(max_length=255, null=False, blank=False)
    description = models.TextField(null=True, blank=False)
    allergens = models.ManyToManyField(Allergen)                      # -> this fields creates table 
    may_contain = models.ManyToManyField(Extra)                       #    between Ingredient and Allergen
    

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class Event:

    def __init__(self):
        self._subscribers = set()

    @property
    def subscribers(self):
        return self._subscribers.copy()

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/**
 * Check if cached record is valid.
 * @param {object} cachedValue - cache record
 * @param {number} cacheTime - time to cache
 * @returns {bool}
 */
const isCached = (cachedValue, cacheTime) =>
  (new Date() - cachedValue.at) / 1000 < cacheTime;

/**

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import React, { unstable_Profiler as Profiler } from "react";

/**
 * Profiles storage.
 */
const profiles = {};

/**
 * Calculate weighted average.
 * @param {number} time - time passed

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import ch.bildspur.postfx.builder.*;
import ch.bildspur.postfx.pass.*;
import ch.bildspur.postfx.*;

/**
 * varaibles
 */
float
  cx,
  cy,

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float A = -2.337,
  B = -2.337,
  C = 0.2553,
  D = 1.378,
  dx = 0.1,
  dy = 0.1;

float X() {
  return A * sin(dx * A) - sin(dy * D);
}

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(function (window) {

  /* reference exposed api based on browser */
  const API = window.chrome || window.browser;

  /* IP address used for calls */
  let IPAddress = "0.0.0.0";

  /* polling period in miliseconds */

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using System;
using System.Linq;
using System.Threading.Tasks;
using System.Collections.Generic;
using System.Collections.Concurrent;

namespace dotnetpad
{
    class Program
    {