【例69.1】过滤多余的空格

状态	递交者	时间	内存	语言	代码	递交时间
AC	15252666790	22ms	512 KiB	C++17(O2)	140 Bytes	2026-1-3 10:36:48
AC	13951145877	24ms	760 KiB	C++17(O2)	138 Bytes	2026-1-3 10:36:33
AC	13901420420	25ms	532 KiB	C++17(O2)	141 Bytes	2026-1-3 10:36:48
AC	15861021069	25ms	760 KiB	C++17(O2)	129 Bytes	2026-1-2 14:06:19
AC	18796792921	25ms	760 KiB	C++17(O2)	140 Bytes	2026-1-10 18:35:41
AC	15996006306	25ms	508 KiB	C++17(O2)	148 Bytes	2026-1-3 10:36:43
AC	15052385956	26ms	508 KiB	C++17(O2)	140 Bytes	2026-1-3 10:39:53
AC	caochungui	26ms	760 KiB	C++17(O2)	144 Bytes	2026-1-3 10:36:01
AC	15952606862	26ms	532 KiB	C++17(O2)	139 Bytes	2026-1-3 10:37:36
AC	13641567801	27ms	504 KiB	C++17(O2)	140 Bytes	2026-1-10 8:54:11
AC	18082060086	27ms	504 KiB	C++17(O2)	133 Bytes	2026-1-7 19:40:06
AC	15896581923	27ms	504 KiB	C++17(O2)	145 Bytes	2026-1-3 10:37:36
AC	17712578847	27ms	512 KiB	C++17(O2)	158 Bytes	2025-10-7 17:10:48
AC	15896015968	28ms	760 KiB	C++17(O2)	163 Bytes	2025-10-7 17:10:17
AC	15052321516	29ms	760 KiB	C++17(O2)	150 Bytes	2026-1-2 14:06:40