interface PriorityQueue<E> {
    add(e: E): boolean;
    clear(): void;
    contains(e: E): boolean;
    peek(): E | null;
    poll(): E | null;
    remove(e: E): boolean;
    size: number;
    isEmpty(): boolean;
}
interface Comparator<E> {
    (a: E, b: E): number;
}
export default class PriorityQueueImpl<E> implements PriorityQueue<E> {
    private stack;
    private comparator;
    size: number;
    constructor();
    constructor(comparator: Comparator<E>);
    constructor(list: E[]);
    constructor(list: E[], comparator?: Comparator<E>);
    static defaultCompartor: Comparator<number>;
    add(e: E): boolean;
    remove(e: E): boolean;
    poll(): E | null;
    clear(): void;
    contains(e: E): boolean;
    peek(): E | null;
    isEmpty(): boolean;
    private slipUp;
    private slipDown;
}
export {};