from collections import OrderedDict


class LRUCache:
    def __init__(self, capacity: int) -> None:
        self._capacity = capacity
        self._cache: OrderedDict[int, int] = OrderedDict()

    def get(self, key: int) -> int:
        if self._capacity == 0 or key not in self._cache:
            return -1
        self._cache.move_to_end(key)
        return self._cache[key]

    def put(self, key: int, value: int) -> None:
        if self._capacity == 0:
            return
        if key in self._cache:
            self._cache.move_to_end(key)
        self._cache[key] = value
        if len(self._cache) > self._capacity:
            self._cache.popitem(last=False)