字符串回文判断（100分）

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	luti	104ms	6.6 MiB	C	2.1 KiB	2026-8-27 0:20:51
AC	RrRY3v9ZMV	116ms	7 MiB	C++14(O2)	2.1 KiB	2026-8-29 18:25:17
AC	倔强的考拉	882ms	48.4 MiB	Java	2 KiB	2026-8-28 8:19:34
AC	l7GjNREkMr	910ms	48.3 MiB	Java	2.1 KiB	2026-8-30 18:38:19
AC	7OaECU6dt2	1269ms	22.5 MiB	Python 3	1.7 KiB	2026-8-30 20:37:34