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	1:20.1.2-0ubuntu1~24.04.3	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	3.0.13-0ubuntu3.11	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 14, 2026 04:22	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 04:20	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 04:18	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 04:17	Yuriy Lyfenko	CPPg++13.3.0	Error	+56.67 RP
Apr 14, 2026 04:12	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 04:01	Yuriy Lyfenko	CPPg++13.3.0	Success	4,715
Apr 14, 2026 04:00	Yuriy Lyfenko	CPPg++13.3.0	Success	4,539
Apr 14, 2026 03:59	Yuriy Lyfenko	CPPg++13.3.0	Success	4,558
Apr 14, 2026 03:53	Yuriy Lyfenko	CPPg++13.3.0	Success	4,288
Apr 14, 2026 03:49	Yuriy Lyfenko	CPPg++13.3.0	Success	4,005
Apr 14, 2026 03:43	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 03:38	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 03:37	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 03:32	Yuriy Lyfenko	CPPg++13.3.0	Error	+53.74 RP
Apr 14, 2026 03:30	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 03:30	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 03:22	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 03:21	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 03:19	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 03:10	Yuriy Lyfenko	CPPg++13.3.0	Error	+76.72 RP
Apr 14, 2026 03:07	Yuriy Lyfenko	CPPg++13.3.0	Error	+138.37 RP
Apr 14, 2026 03:04	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:53	Yuriy Lyfenko	CPPclang++18.1.3	Error
Apr 14, 2026 02:52	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:44	Yuriy Lyfenko	CPPclang++18.1.3	Error
Apr 14, 2026 02:38	Yuriy Lyfenko	CPPg++13.3.0	Error	+11.51 RP
Apr 14, 2026 02:38	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:33	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:31	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:31	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:29	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:29	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:22	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:11	Yuriy Lyfenko	CPPg++13.3.0	Error	+9.90 RP
Apr 14, 2026 02:10	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 02:08	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 01:48	Yuriy Lyfenko	CPPg++13.3.0	Error	+183.47 RP
Apr 9, 2026 00:37	olliecrow	CSHARP9.0.14	Success	39,821
Apr 8, 2026 07:49	olliecrow	CPPclang++18.1.3	Success	3,573
Apr 8, 2026 05:39	olliecrow	GOgo1.26.1	Success	8,411+480.80 RP
Apr 6, 2026 23:26	olliecrow	RUSTrust-1.94.0	Success	3,396+7.78 RP
Apr 6, 2026 23:24	olliecrow	RUSTrust-1.94.0	Success	3,445
Apr 6, 2026 23:22	olliecrow	RUSTrust-1.94.0	Success	3,437
Apr 1, 2026 01:53	olliecrow	CPPclang++18.1.3	Error
Mar 31, 2026 09:42	Dominique Garmier	RUSTrust-1.94.1	Success	12,977
Mar 30, 2026 21:05	Dominique Garmier	RUSTrust-1.94.1	Success	9,528
Mar 30, 2026 16:34	Dominique Garmier	GOgo1.26.1	Success	17,695
Mar 30, 2026 14:54	Dominique Garmier	RUSTrust-1.94.1	Error	+56.72 RP
Mar 30, 2026 13:54	Dominique Garmier	RUSTrust-1.94.1	Success	10,697
Mar 30, 2026 13:30	Dominique Garmier	RUSTrust-1.94.1	Success	18,486
Mar 30, 2026 13:29	Dominique Garmier	RUSTrust-1.94.1	Success	17,215
Mar 30, 2026 13:27	Dominique Garmier	RUSTrust-1.94.1	Success	13,092
Mar 30, 2026 12:55	Dominique Garmier	RUSTrust-1.94.1	Error
Mar 30, 2026 12:55	Dominique Garmier	RUSTrust-1.94.1	Success	13,144
Mar 30, 2026 12:27	Dominique Garmier	RUSTrust-1.94.1	Success	17,249
Mar 30, 2026 11:28	Dominique Garmier	RUSTrust-1.94.1	Success	12,473
Mar 30, 2026 10:46	Dominique Garmier	RUSTrust-1.94.1	Success	12,451
Mar 30, 2026 10:22	Dominique Garmier	RUSTrust-1.94.1	Success	164,728
Mar 30, 2026 09:21	Dominique Garmier	RUSTrust-1.94.1	Success	12,889
Mar 30, 2026 08:36	Dominique Garmier	RUSTrust-1.94.1	Success	10,460
Mar 30, 2026 07:28	Dominique Garmier	RUSTrust-1.94.1	Error
Mar 30, 2026 04:02	Dominique Garmier	RUSTrust-1.94.1	Success	12,775
Mar 30, 2026 01:56	Dominique Garmier	RUSTrust-1.94.1	Success	12,553
Mar 30, 2026 01:54	Dominique Garmier	RUSTrust-1.94.1	Success	12,930
Mar 30, 2026 01:53	Dominique Garmier	RUSTrust-1.94.1	Success	18,266
Mar 30, 2026 00:14	Dominique Garmier	RUSTrust-1.94.1	Success	13,274
Mar 30, 2026 00:13	Dominique Garmier	RUSTrust-1.94.1	Success	10,115
Mar 29, 2026 23:47	Dominique Garmier	RUSTrust-1.94.1	Success	12,416
Mar 29, 2026 23:36	Dominique Garmier	RUSTrust-1.94.1	Success	320,486
Mar 29, 2026 22:19	Dominique Garmier	RUSTrust-1.94.1	Success	117,721
Mar 29, 2026 22:11	Dominique Garmier	RUSTrust-1.94.1	Success	197,622
Mar 29, 2026 21:47	Dominique Garmier	RUSTrust-1.94.1	Success	18,535
Mar 29, 2026 21:46	Dominique Garmier	RUSTrust-1.94.1	Success	115,439
Mar 29, 2026 21:14	Dominique Garmier	RUSTrust-1.94.1	Success	197,566
Mar 29, 2026 20:17	Dominique Garmier	RUSTrust-1.94.1	Success	154,912
Mar 29, 2026 20:00	Dominique Garmier	RUSTrust-1.94.1	Success	135,296
Mar 29, 2026 18:44	Dominique Garmier	RUSTrust-1.94.1	Success	172,159
Mar 29, 2026 18:11	Dominique Garmier	RUSTrust-1.94.1	Success	407,724
Mar 29, 2026 16:42	Dominique Garmier	RUSTrust-1.94.1	Success	313,813
Mar 29, 2026 16:17	Dominique Garmier	RUSTrust-1.94.0	Success	212,922
Mar 29, 2026 16:16	Dominique Garmier	RUSTrust-1.94.0	Success	161,071
Mar 29, 2026 16:11	Dominique Garmier	RUSTrust-1.94.0	Error
Mar 29, 2026 13:17	Dominique Garmier	CPPg++13.3.0	Success	8,236
Mar 29, 2026 13:14	Dominique Garmier	CPPg++13.3.0	Success	4,784
Mar 29, 2026 13:12	Dominique Garmier	CPPg++13.3.0	Error
Mar 29, 2026 00:43	Dominique Garmier	GOgo1.26.1	Success	21,465
Mar 29, 2026 00:42	Dominique Garmier	GOgo1.26.1	Success	26,434
Mar 29, 2026 00:16	Dominique Garmier	GOgo1.26.1	Success	42,083
Mar 29, 2026 00:14	Dominique Garmier	GOgo1.26.1	Success	16,672
Mar 29, 2026 00:14	Dominique Garmier	GOgo1.26.1	Error
Mar 29, 2026 00:13	Dominique Garmier	GOgo1.26.1	Error
Mar 28, 2026 21:51	Dominique Garmier	CPPg++13.3.0	Error
Mar 28, 2026 21:44	Dominique Garmier	CPPg++13.3.0	Error
Mar 28, 2026 21:38	Dominique Garmier	CPPg++13.3.0	Error	+1'321.67 RP
Mar 28, 2026 21:30	Dominique Garmier	CPPclang++18.1.3	Success	7,026
Mar 28, 2026 21:29	Dominique Garmier	CPPg++13.3.0	Success	6,864+95.41 RP
Mar 28, 2026 21:28	Dominique Garmier	CPPg++13.3.0	Success	10,268
Mar 28, 2026 21:27	Dominique Garmier	CPPg++13.3.0	Success	11,507
Mar 28, 2026 21:26	Dominique Garmier	CPPg++13.3.0	Error
Mar 28, 2026 21:22	Dominique Garmier	CPPg++13.3.0	Error	+290.00 RP

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