Median

Find the median of a stream of binary integers as fast as possible.

Input: 100 000 000 uint32 values in little-endian binary on STDIN (4 bytes each).

Output: The median value, printed as a decimal string. The median is defined as the element at index N/2 (i.e., a[50000000]) in the sorted array.

Restrictions:20s512Mb 1 Score Packages

Feel free to create an issue if you need an extra library from the standard Ubuntu repository.

Name	Version	Description
libc6-dev	2.39-0ubuntu8.7	GNU C Library: Development Libraries and Header Files Contains the symlinks, headers, and object files needed to compile and link programs which use the standard C library.
libclang-common-14-dev	1:14.0.6-19build4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-15-dev	1:15.0.7-14build3	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-16-dev	1:16.0.6-23ubuntu4	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-17-dev	1:17.0.6-9ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-18-dev	1:18.1.3-1ubuntu1	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-19-dev	1:19.1.1-1ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libclang-common-20-dev	1:20.1.2-0ubuntu1~24.04.2	Clang library - Common development package Clang project is a C, C++, Objective C and Objective C++ front-end based on the LLVM compiler. Its goal is to offer a replacement to the GNU Compiler Collection (GCC). . Clang implements all of the ISO C++ 1998, 11, 14 and 17 standards and also provides most of the support of C++20. . This package contains the Clang generic headers.
libcrypt-dev	1:4.4.36-4build1	libcrypt development files This package contains the files needed for developing applications that use libcrypt.
libgcc-10-dev	10.5.0-4ubuntu2.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-11-dev	11.5.0-1ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-12-dev	12.4.0-2ubuntu1~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-13-dev	13.3.0-6ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libgcc-14-dev	14.2.0-4ubuntu2~24.04.1	GCC support library (development files) This package contains the headers and static library files necessary for building C programs which use libgcc, libgomp, libquadmath, libssp or libitm.
libobjc-13-dev	13.3.0-6ubuntu2~24.04.1	Runtime library for GNU Objective-C applications (development files) This package contains the headers and static library files needed to build GNU ObjC applications.
libssl-dev	3.0.13-0ubuntu3.9	Secure Sockets Layer toolkit - development files This package is part of the OpenSSL project's implementation of the SSL and TLS cryptographic protocols for secure communication over the Internet. . It contains development libraries, header files, and manpages for libssl and libcrypto.
libstdc++-10-dev	10.5.0-4ubuntu2.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-11-dev	11.5.0-1ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-12-dev	12.4.0-2ubuntu1~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-13-dev	13.3.0-6ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libstdc++-14-dev	14.2.0-4ubuntu2~24.04.1	GNU Standard C++ Library v3 (development files) This package contains the headers and static library files necessary for building C++ programs which use libstdc++. . libstdc++-v3 is a complete rewrite from the previous libstdc++-v2, which was included up to g++-2.95. The first version of libstdc++-v3 appeared in g++-3.0.
libtbb-dev	2021.11.0-2ubuntu2	parallelism library for C++ - development files TBB is a library that helps you leverage multi-core processor performance without having to be a threading expert. It represents a higher-level, task-based parallelism that abstracts platform details and threading mechanism for performance and scalability. . (Note: if you are a user of the i386 architecture, i.e., 32-bit Intel or compatible hardware, this package only supports Pentium4-compatible and higher processors.) . This package includes the TBB development files.

Date	Author	Language	Status	Score
Apr 25, 2026 08:02	olliecrow	CPPclang++18.1.3	Success	23,058
Apr 25, 2026 07:57	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 07:53	limanjun99	CPPg++14.2.0	Success	4,156+22.37 RP
Apr 25, 2026 07:50	limanjun99	CPPg++14.2.0	Success	4,195+50.07 RP
Apr 25, 2026 07:48	limanjun99	CPPg++14.2.0	Success	4,285+109.52 RP
Apr 25, 2026 07:39	limanjun99	CPPg++14.2.0	Success	5,555
Apr 25, 2026 07:31	limanjun99	CPPg++14.2.0	Success	5,339
Apr 25, 2026 07:26	limanjun99	CPPg++14.2.0	Success	4,517
Apr 25, 2026 07:05	olliecrow	CSHARP9.0.15	Success	44,185
Apr 25, 2026 07:03	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 07:01	olliecrow	CSHARP9.0.15	Error
Apr 25, 2026 07:00	limanjun99	CPPg++14.2.0	Success	46,207
Apr 25, 2026 06:46	olliecrow	CPPg++10.5.0	Success	3,505
Apr 25, 2026 06:44	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 06:42	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 06:38	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 06:35	limanjun99	CPPg++14.2.0	Success	4,496+342.38 RP
Apr 25, 2026 06:34	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 06:31	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 06:26	olliecrow	CSHARP9.0.15	Success	3,627+30.82 RP
Apr 25, 2026 06:26	limanjun99	CPPg++14.2.0	Success	5,314+1'592.85 RP
Apr 25, 2026 06:18	olliecrow	CSHARP9.0.15	Success	3,668+7.41 RP
Apr 25, 2026 06:16	limanjun99	CPPg++14.2.0	Success	34,605+45.69 RP
Apr 25, 2026 06:14	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 05:31	limanjun99	CPPg++14.2.0	Success	45,458
Apr 25, 2026 05:27	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 05:06	limanjun99	CPPg++14.2.0	Success	43,067
Apr 25, 2026 04:59	limanjun99	CPPg++14.2.0	Success	42,149
Apr 25, 2026 04:57	limanjun99	CPPg++14.2.0	Success	42,606
Apr 25, 2026 04:55	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 04:53	limanjun99	CPPg++14.2.0	Success	41,196
Apr 25, 2026 04:38	limanjun99	CPPg++14.2.0	Error
Apr 25, 2026 02:44	olliecrow	CPPclang++18.1.3	Error
Apr 25, 2026 00:59	olliecrow	CSHARP9.0.15	Error
Apr 25, 2026 00:53	olliecrow	CPPg++10.5.0	Success	23,756
Apr 24, 2026 23:03	olliecrow	CSHARP9.0.15	Success	36,952
Apr 24, 2026 22:51	olliecrow	CPPg++10.5.0	Success	3,339
Apr 24, 2026 20:34	olliecrow	CSHARP9.0.15	Success	35,264
Apr 24, 2026 20:31	olliecrow	CSHARP9.0.15	Error
Apr 24, 2026 20:06	olliecrow	CPPg++10.5.0	Success	3,319
Apr 24, 2026 18:47	olliecrow	CPPclang++18.1.3	Success	21,875
Apr 24, 2026 18:20	olliecrow	CPPg++10.5.0	Success	3,414
Apr 24, 2026 12:55	olliecrow	CSHARP9.0.15	Success	35,359
Apr 24, 2026 12:24	olliecrow	CSHARP9.0.15	Error
Apr 24, 2026 12:17	olliecrow	CSHARP9.0.15	Error
Apr 24, 2026 12:04	olliecrow	CPPg++10.5.0	Success	32,666
Apr 24, 2026 11:59	olliecrow	CPPg++10.5.0	Success	23,741
Apr 24, 2026 09:39	olliecrow	CPPg++10.5.0	Success	23,748
Apr 24, 2026 09:32	olliecrow	CPPg++10.5.0	Success	23,762
Apr 24, 2026 08:09	olliecrow	CSHARP9.0.15	Success	36,842
Apr 24, 2026 07:31	olliecrow	CSHARP9.0.15	Error
Apr 24, 2026 07:20	olliecrow	CPPclang++18.1.3	Success	23,245
Apr 24, 2026 05:48	Charles Cabergs	CPPg++13.3.0	Success	9,739
Apr 24, 2026 05:30	olliecrow	CPPclang++18.1.3	Success	3,412
Apr 24, 2026 03:28	olliecrow	CPPg++10.5.0	Success	32,454
Apr 24, 2026 02:22	olliecrow	CPPg++10.5.0	Success	23,760
Apr 24, 2026 01:32	olliecrow	CSHARP9.0.15	Error
Apr 24, 2026 00:21	olliecrow	CSHARP9.0.15	Success	3,678+347.51 RP
Apr 24, 2026 00:16	olliecrow	CSHARP9.0.15	Success	37,015
Apr 24, 2026 00:05	olliecrow	CPPg++10.5.0	Success	17,286
Apr 23, 2026 23:32	olliecrow	CSHARP9.0.14	Error
Apr 23, 2026 23:26	olliecrow	CSHARP9.0.15	Success	12,623
Apr 23, 2026 21:44	olliecrow	CSHARP9.0.15	Success	33,171
Apr 23, 2026 20:32	Charles Cabergs	CPPg++13.3.0	Success	4,729+222.46 RP
Apr 23, 2026 19:29	Charles Cabergs	CPPg++13.3.0	Success	5,285+56.27 RP
Apr 23, 2026 09:07	Charles Cabergs	CPPg++13.3.0	Success	5,475
Apr 23, 2026 05:53	Charles Cabergs	CPPg++13.3.0	Success	5,447+24.28 RP
Apr 23, 2026 04:01	Charles Cabergs	CPPg++13.3.0	Success	5,538
Apr 23, 2026 03:24	olliecrow	CPPg++10.5.0	Success	23,763
Apr 23, 2026 03:19	olliecrow	CPPg++10.5.0	Success	23,776
Apr 23, 2026 03:14	olliecrow	CPPg++10.5.0	Success	3,361
Apr 23, 2026 02:13	Charles Cabergs	CPPg++13.3.0	Success	5,659
Apr 23, 2026 00:39	Charles Cabergs	CPPg++13.3.0	Success	5,520+80.89 RP
Apr 22, 2026 23:56	olliecrow	CSHARP9.0.14	Success	12,782
Apr 22, 2026 20:50	olliecrow	CPPclang++18.1.3	Success	23,308
Apr 22, 2026 18:41	olliecrow	CPPclang++18.1.3	Success	30,128
Apr 22, 2026 17:40	olliecrow	CPPg++10.5.0	Success	18,927
Apr 22, 2026 17:34	olliecrow	CPPg++10.5.0	Success	23,764
Apr 22, 2026 16:44	Charles Cabergs	CPPg++13.3.0	Success	5,778+624.75 RP
Apr 22, 2026 16:19	olliecrow	CPPg++10.5.0	Success	23,807
Apr 22, 2026 08:15	olliecrow	RUSTrust-1.95.0	Success	22,811
Apr 22, 2026 08:11	olliecrow	RUSTrust-1.95.0	Success	22,802
Apr 22, 2026 07:35	olliecrow	CSHARP9.0.14	Success	46,250
Apr 22, 2026 07:32	olliecrow	CSHARP9.0.14	Success	42,300
Apr 22, 2026 02:28	olliecrow	RUSTrust-1.95.0	Success	3,357+34.21 RP
Apr 22, 2026 02:28	olliecrow	RUSTrust-1.95.0	Success	3,467
Apr 22, 2026 02:28	olliecrow	RUSTrust-1.95.0	Success	3,593
Apr 22, 2026 02:24	olliecrow	RUSTrust-1.95.0	Success	29,139
Apr 22, 2026 02:08	olliecrow	GOgo1.26.2	Success	14,509
Apr 22, 2026 01:48	olliecrow	CSHARP9.0.14	Success	12,848
Apr 22, 2026 01:33	olliecrow	CPPg++10.5.0	Success	32,253
Apr 21, 2026 22:17	Ben	CPPclang++20.1.2	Success	12,534+17.31 RP
Apr 21, 2026 22:08	Ben	CPPclang++18.1.3	Success	12,812+479.13 RP
Apr 21, 2026 18:18	Charles Cabergs	CPPg++13.3.0	Success	9,042+98.80 RP
Apr 21, 2026 16:10	Charles Cabergs	CPPg++13.3.0	Success	9,997
Apr 21, 2026 09:36	olliecrow	CPPg++10.5.0	Success	32,070
Apr 21, 2026 07:17	olliecrow	CPPg++10.5.0	Success	3,406
Apr 21, 2026 07:01	olliecrow	CPPg++10.5.0	Success	3,660
Apr 21, 2026 00:47	Taylor Dettling	RUSTrust-1.95.0	Error
Apr 21, 2026 00:45	Taylor Dettling	RUSTrust-1.95.0	Error

Model	Intel(R) Xeon(R) CPU E3-1271 v3 @ 3.60GHz
Cores	1