[IOI2000] 回文字串

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	杜俊睿	45ms	680 KiB	C++11	1.5 KiB	2023-12-7 15:10:25
AC	高浚庭	48ms	3.5 MiB	C++11	1.7 KiB	2023-12-7 15:06:50
AC	刘昊林	50ms	3.5 MiB	C++11	375 Bytes	2023-12-5 16:20:43
AC	徐彰	72ms	8.2 MiB	C++11	3 KiB	2023-12-7 14:57:11