This problem is in Contest(s) below:
Contest 1868:摸底
Contest 1778:查漏补缺基础4
Contest 1882:基础标记练习
Contest 1967:语法提高-数组练习-(2)桶数组
Contest 1403:参加冬令营同学网课练习题目
Contest 1908:一维数组综合练习
Contest 1175:hyd模拟题目训练
Contest 1484:基础语言提高班-晚测2
Contest 1488:基础语言提高班-晚测2补题
Contest 1384:基础班0121第四天晚测
Contest 1725:2023语言提高班第二天
Contest 1164:基础3班 - 决赛圈
Contest 1685:2023基础提高班晚测3
Contest 1692:2023基础提高晚测3补题
Contest 1690:2023基础提高班4
Contest 1753:2023零基础假期练习（循环练习)