This problem is in Contest(s) below:
Contest 1330:NJ信息学编程训练3-14
Contest 1779:2025CSPJ集训3
Contest 1491:NJ信息学奥赛编程基础集训2-7
Contest 1340:NJ信息学编程训练3-18
Contest 1342:2023寒假信息学编程集训2