function result(age, priceMachine, priceToy) {
  age = Number(age);
  priceMachine = Number(priceMachine);
  priceToy = Number(priceToy);

  let money = 0;
  let birthdayMoney = 10;
  let toys = 0;

  for (let i = 1; i <= age; i++) {
    if (i % 2 == 0) {
      money += birthdayMoney;
      birthdayMoney += 10;
      money -= 1;
    } else {
      toys++;
    }
  }

  money += toys * priceToy;

  if (money >= priceMachine) {
    console.log(`Yes! ${(money - priceMachine).toFixed(2)}`);
  } else {
    console.log(`No! ${(priceMachine - money).toFixed(2)}`);
  }
}