第一道题 小红抽卡纯模拟 定义一个2n-1的数组进行不断插入 public class num { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); int[] ans = new int[n]; for (int i = 0; i < n; i++) { ans[i] = in.nextInt(); } int a = 0; int b = 0; for (int i = 0; i < n - 1; i++) { if(ans[i]...