This problem is in Contest(s) below:
Contest 1510:23秋季C++基础5
Contest 1674:2024C++入门3
Contest 1732:25春季C++零基础2
Contest 1165:20220505-0520C程序设计理论课作业
Contest 1662:2024C++入门1
Contest 1690:2024C++入门6
Contest 1766:2025CYX暑期编程训练1
Contest 1164:C++编程入门25
Contest 1262:暑期C++入门集训2
Contest 1288:2022秋季C++入门1