【例20.1】范围判断

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	小赵老师	11ms	512 KiB	C++14	148 Bytes	2026-4-13 18:06:32
AC	李昀柯	11ms	768 KiB	C++14	127 Bytes	2026-4-13 18:08:16
AC	金士涵	11ms	512 KiB	C++14	128 Bytes	2026-4-13 18:09:07
AC	龙傲天	11ms	768 KiB	C++14	126 Bytes	2026-4-13 18:08:29