/**
* @param {number[]} stones
* @return {number}
*/
var lastStoneWeight = function(stones) {
const stonesQueue = new MaxPriorityQueue();
let length = stones.length;
for(let i = 0; i < length; i++) {
stonesQueue.enqueue(stones[i]);
}
while(stonesQueue.size() > 1) {
let y = stonesQueue.dequeue().element;
let x = stonesQueue.dequeue().element;
if(y !== x) {
y = y - x;
stonesQueue.enqueue(y);
} else {
stonesQueue.enqueue(0);
}
}
return stonesQueue.dequeue().element;
};