【入门】回文偶数？

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	UID 43	2ms	496 KiB	C++14(O2)	193 Bytes	2026-2-7 9:56:43
AC	liyuannuo	2ms	504 KiB	C++14(O2)	372 Bytes	2026-3-10 12:44:55
AC	zhuzeyu	2ms	492 KiB	C++14(O2)	559 Bytes	2026-2-7 9:55:04
AC	dengzerui	2ms	484 KiB	C++14(O2)	363 Bytes	2026-2-4 16:10:03
AC	UID 62	2ms	512 KiB	C++14(O2)	279 Bytes	2026-2-25 19:38:29
AC	zengzhuoan	3ms	676 KiB	C++14(O2)	193 Bytes	2026-2-7 20:01:38
AC	guochengrui	3ms	484 KiB	C++14(O2)	191 Bytes	2026-6-1 14:32:23