题目链接

class Solution {
    public int lastStoneWeight(int[] stones) {
        int len = stones.length;
        if(len == 1){
            return stones[0];
        }
        if(len == 2){
            return Math.abs(stones[0] - stones[1]);

        }
        while(true){
            Arrays.sort(stones);
            if(stones[len - 2] == 0){
                break;
            }
            stones[len - 1] = stones[len - 1] - stones[len - 2];
            stones[len - 2] = 0;
        }
        return stones[len - 1];
    }
}