【字符串2】字符串插入问题

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	CodeFundd8c8965e9	14ms	6.6 MiB	C++11	518 Bytes	2025-3-6 16:43:06
AC	yonghuming123qaq	14ms	6.6 MiB	C++17(O2)	618 Bytes	2025-3-6 17:46:31
AC	CodeFun3a8538499b	14ms	6.4 MiB	C++98	477 Bytes	2025-1-11 13:49:43
AC	L	14ms	6.5 MiB	C++98	636 Bytes	2025-3-13 23:14:27
AC	CodeFun050601be11	15ms	6.7 MiB	C++98	597 Bytes	2025-3-12 21:53:12
AC	CodeFuna479b9eb77	15ms	6.6 MiB	C++98	752 Bytes	2025-3-6 15:47:20
AC	六维的羊	15ms	6.6 MiB	C++17(O2)	661 Bytes	2025-3-1 23:07:09
AC	CodeFun54bbb8018e	16ms	6.7 MiB	C++98	575 Bytes	2025-3-13 20:48:46
AC	CodeFun5e4668e83a	16ms	6.5 MiB	C++11	538 Bytes	2025-2-20 21:57:26
AC	CodeFun750de23c11	16ms	6.6 MiB	C++11	555 Bytes	2025-3-8 16:37:33
AC	Joustrd	16ms	6.6 MiB	C++98	643 Bytes	2025-3-5 17:59:49
AC	ArChong	16ms	6.6 MiB	C++98	652 Bytes	2025-3-7 16:09:30
AC	CodeFun4d554c1fb3	16ms	6.5 MiB	C++11	845 Bytes	2025-2-20 22:54:21
AC	CodeFun894857eccc	16ms	6.4 MiB	C++98	758 Bytes	2025-1-11 22:01:08
AC	DeminusYuan	16ms	6.5 MiB	C++11	635 Bytes	2025-1-18 16:17:40
AC	shiki	17ms	6.6 MiB	C++11	562 Bytes	2025-3-2 23:20:08
AC	hongshi	17ms	6.6 MiB	C++11	1.1 KiB	2025-3-5 21:17:39
AC	CodeFuncbc11165b6	17ms	6.6 MiB	C++11	1.8 KiB	2025-3-9 16:32:24
AC	windya	20ms	6.8 MiB	C++98	644 Bytes	2025-3-20 16:47:31
AC	CodeFun97f7364d71	22ms	6.6 MiB	C++11	584 Bytes	2025-3-4 23:21:16