declare type element = number | object | string;
interface compareFunction {
    (a: element, b: element): number;
}
export default class PriorityQueue {
    private pq;
    private _size;
    private compare;
    constructor(fn?: compareFunction);
    private parent;
    private left;
    private right;
    private larger;
    private swim;
    private sink;
    enqueue(ele: element): void;
    dequeue(): element | null;
    getHead(): element | null;
    get size(): number;
}
export {};