求第 k 小的数

Status	Submit By	Time	Memory	Language	Code	Submit At
AC	ymhuang	18ms	18.4 MiB	C++11(O2)	571 Bytes	2025-7-26 8:14:11
AC	lichengran	20ms	18.4 MiB	C++11	304 Bytes	2025-7-26 8:09:21
AC	qiuyouxiang	20ms	18.4 MiB	C++11(O2)	323 Bytes	2025-7-26 8:11:36
AC	xiejin	20ms	18.4 MiB	C++11(O2)	455 Bytes	2025-7-24 9:46:19
AC	Ouclid	20ms	18.4 MiB	C++14(O2)	490 Bytes	2025-7-26 8:10:00
AC	1232RvE	20ms	18.4 MiB	C++11(O2)	363 Bytes	2025-7-26 8:15:59
AC	Duxin	21ms	18.4 MiB	C++14(O2)	287 Bytes	2025-7-26 8:20:33
AC	xingfx	21ms	18.4 MiB	C++11(O2)	313 Bytes	2025-7-24 9:00:37
AC	Guest	22ms	18.4 MiB	C++11(O2)	512 Bytes	2025-7-24 9:53:24
AC	liaohaoyu	22ms	18.4 MiB	C++11(O2)	613 Bytes	2025-7-26 8:39:49
AC	FeI2	22ms	18.4 MiB	C++11(O2)	293 Bytes	2025-7-24 11:18:47
AC	cd2z-ys	22ms	18.4 MiB	C++14(O2)	363 Bytes	2025-7-23 17:24:31
AC	aerfa21	23ms	18.4 MiB	C++11(O2)	337 Bytes	2025-7-26 8:34:43
AC	yyhang	24ms	18.4 MiB	C++11(O2)	477 Bytes	2025-7-26 10:10:36
AC	bjtqcz	24ms	18.4 MiB	C++11(O2)	282 Bytes	2025-7-24 9:49:42
AC	Fan	24ms	18.4 MiB	C++11(O2)	438 Bytes	2025-7-24 9:55:07
AC	lyj	25ms	18.4 MiB	C++11	345 Bytes	2025-7-26 8:14:20