function skiTrip(input) {
  let days = Number(input[0]);
  let roomType = input[1];
  let feedback = input[2];
  let nights = days - 1;
  let priceForRoom = 0;

  switch (roomType) {
    case "room for one person":
      priceForRoom = nights * 18;
      break;
    case "apartment":
      if (nights < 10) {
        priceForRoom = nights * 25 * 0.7;
      } else if (nights <= 15) {
        priceForRoom = nights * 25 * 0.65;
      } else if (nights > 15) {
        priceForRoom = nights * 25 * 0.5;
      }
      break;

    case "president apartment":
      if (nights < 10) {
        priceForRoom = nights * 35 * 0.9;
      } else if (nights <= 15) {
        priceForRoom = nights * 35 * 0.85;
      } else if (nights > 15) {
        priceForRoom = nights * 35 * 0.8;
      }
      break;
  }

  if (feedback === "positive") {
    priceForRoom = priceForRoom * 1.25;
  } else if (feedback === "negative") {
    priceForRoom = priceForRoom * 0.9;
  }
  console.log(priceForRoom.toFixed(2));
}
skiTrip(["14", "apartment", "positive"]);