class HashTable:

    def __init__(self, capacity=10):
        if type(capacity) is not int:
            raise TypeError("Kapacita musí byť celé číslo (int)")
        if capacity <= 0:
            raise ValueError("Kapacita musí byť kladné číslo")
        self.__capacity = capacity
        self._size = 0

        self.empty = object()
        self.deleted = object()
        self.slots = [self.empty] * self.__capacity

    @property
    def capacity(self):
        return self.__capacity

    def _check_key(self, key):
        if not isinstance(key, str):
            raise TypeError("Kľúč musí byť reťazec (str)")

    def hash(self, key):
        self._check_key(key)
        h = 0
        for char in key:
            h = (31 * h + ord(char)) % self.__capacity
        return h

    def probe(self, key):
        self._check_key(key)
        start_index = self.hash(key)
        first_deleted = None

        for krok in range(self.__capacity):
            index = (start_index + krok) % self.__capacity
            slot = self.slots[index]

            if slot is self.empty:
                if first_deleted is not None:
                    return first_deleted
                return index

            elif slot is self.deleted:
                if first_deleted is None:
                    first_deleted = index

            else:
                if slot[0] == key:
                    return index

        if first_deleted is not None:
            return first_deleted

        raise RuntimeError("Tabuľka je plná")