10035. Minimum Number Game

You are given a 0-indexed integer array nums of even length and there is also an empty array arr. Alice and Bob decided to play a game where in every round Alice and Bob will do one move. The rules of the game are as follows:

• Every round, first Alice will remove the minimum element from nums, and then Bob does the same.
• Now, first Bob will append the removed element in the array arr, and then Alice does the same.
• The game continues until nums becomes empty.

Return the resulting array arr.

class Solution {
public:
    vector<int> numberGame(vector<int>& A) {
        vector<int> res;
        sort(begin(A), end(A));
        for(int i = 0; i < A.size(); i+=2) {
            res.push_back(A[i+1]);
            res.push_back(A[i]);
        }
        return res;
    }
};