Leetcode-950 Reveal Cards In Increasing Order(按递增顺序显示卡牌)

class Solution
{
    public:
        vector<int> deckRevealedIncreasing(vector<int>& deck)
        {
            sort(deck.begin(),deck.end());
            vector<int> rnt (deck.size(),0);
            int deckend = 0;
            int flag = 1;
            for(int i = 0;deckend < deck.size();i = (i+1)%(deck.size()))
            {
                if(!rnt[i])
                {
                    if(flag) rnt[i] = deck[deckend++];
                    flag = !flag;
                }
            }
            return rnt;
        }
};

参考了大神的代码，本质是约瑟夫环。在还没填上数字的空格里隔一个填一个