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
Aug 29, 2026 09:10	Victor Mercklé	CPPg++14.2.0	Success	2,906
Aug 29, 2026 09:01	Victor Mercklé	CPPg++14.2.0	Success	2,869
Aug 29, 2026 08:52	Victor Mercklé	CPPg++14.2.0	Success	5,507
Aug 29, 2026 08:34	Victor Mercklé	CPPg++14.2.0	Success	30,774
Aug 27, 2026 11:19	Haha Expert	CSHARP9.0.15	Error
Aug 27, 2026 11:12	Haha Expert	CSHARP8.0.29	Error
Aug 23, 2026 22:05	Andrew Epstein	CPPg++14.2.0	Success	25,705+62.84 RP
Aug 23, 2026 19:42	Victor Mercklé	CPPg++14.2.0	Success	2,766
Aug 23, 2026 19:30	Victor Mercklé	CPPg++14.2.0	Success	5,697
Aug 23, 2026 19:20	Victor Mercklé	CPPg++14.2.0	Success	5,419
Aug 23, 2026 19:17	Victor Mercklé	CPPg++14.2.0	Success	5,417
Aug 23, 2026 19:14	Victor Mercklé	CPPg++14.2.0	Success	5,433
Aug 23, 2026 19:12	Victor Mercklé	CPPg++14.2.0	Success	5,444
Aug 23, 2026 19:09	Victor Mercklé	CPPg++14.2.0	Success	5,663
Aug 23, 2026 19:07	Victor Mercklé	CPPg++14.2.0	Success	3,146
Aug 23, 2026 19:04	Victor Mercklé	CPPg++14.2.0	Success	5,377
Aug 23, 2026 18:59	Victor Mercklé	CPPg++14.2.0	Success	5,444
Aug 23, 2026 18:50	Victor Mercklé	CPPg++14.2.0	Success	2,867
Aug 23, 2026 18:44	Victor Mercklé	CPPg++14.2.0	Success	5,364
Aug 23, 2026 18:34	Victor Mercklé	CPPg++14.2.0	Success	5,375
Aug 23, 2026 18:29	Victor Mercklé	CPPg++14.2.0	Success	2,809
Aug 23, 2026 18:25	Victor Mercklé	CPPg++14.2.0	Success	2,847
Aug 23, 2026 18:22	Victor Mercklé	CPPg++14.2.0	Success	2,787
Aug 23, 2026 18:18	Victor Mercklé	CPPg++14.2.0	Success	2,775
Aug 23, 2026 18:14	Victor Mercklé	CPPg++14.2.0	Success	2,904
Aug 23, 2026 18:12	Victor Mercklé	CPPg++14.2.0	Success	5,394
Aug 23, 2026 18:07	Victor Mercklé	CPPg++14.2.0	Success	2,905
Aug 23, 2026 18:04	Victor Mercklé	CPPg++14.2.0	Success	5,416
Aug 23, 2026 18:01	Victor Mercklé	CPPg++14.2.0	Success	5,510
Aug 23, 2026 17:59	Victor Mercklé	CPPg++14.2.0	Success	2,894
Aug 23, 2026 17:56	Victor Mercklé	CPPg++14.2.0	Success	2,886
Aug 23, 2026 17:52	Victor Mercklé	CPPg++14.2.0	Success	2,893
Aug 23, 2026 17:49	Victor Mercklé	CPPg++14.2.0	Success	2,956
Aug 23, 2026 17:47	Victor Mercklé	CPPg++14.2.0	Success	2,860
Aug 23, 2026 17:43	Victor Mercklé	CPPg++14.2.0	Success	2,887
Aug 23, 2026 17:40	Victor Mercklé	CPPg++14.2.0	Success	5,404
Aug 23, 2026 17:37	Victor Mercklé	CPPg++14.2.0	Success	5,385
Aug 23, 2026 17:32	Victor Mercklé	CPPg++14.2.0	Success	2,834
Aug 23, 2026 17:12	Victor Mercklé	CPPg++14.2.0	Success	4,442
Aug 23, 2026 17:08	Victor Mercklé	CPPg++14.2.0	Success	2,800
Aug 23, 2026 17:05	Victor Mercklé	CPPg++14.2.0	Success	2,803
Aug 23, 2026 17:00	Victor Mercklé	CPPg++14.2.0	Success	2,783
Aug 23, 2026 16:54	Victor Mercklé	CPPg++14.2.0	Success	2,779
Aug 23, 2026 16:52	Victor Mercklé	CPPg++14.2.0	Success	5,595
Aug 23, 2026 16:45	Victor Mercklé	CPPg++14.2.0	Success	3,335
Aug 23, 2026 16:37	Victor Mercklé	CPPg++14.2.0	Success	39,098
Aug 23, 2026 16:28	Victor Mercklé	CPPg++14.2.0	Success	3,370
Aug 23, 2026 16:23	Victor Mercklé	CPPg++14.2.0	Success	3,418
Aug 23, 2026 16:13	Victor Mercklé	CPPg++14.2.0	Success	2,762+1.31 RP
Aug 23, 2026 16:07	Victor Mercklé	CPPg++14.2.0	Success	2,899
Aug 23, 2026 16:04	Victor Mercklé	CPPg++14.2.0	Success	10,047
Aug 23, 2026 16:01	Victor Mercklé	CPPg++14.2.0	Success	10,465
Aug 23, 2026 15:55	Victor Mercklé	CPPg++14.2.0	Success	2,775
Aug 23, 2026 15:42	Victor Mercklé	CPPg++14.2.0	Success	5,427
Aug 23, 2026 15:38	Andrew Epstein	CPPg++14.2.0	Success	30,657+315.73 RP
Aug 23, 2026 15:28	Victor Mercklé	CPPg++14.2.0	Success	2,783
Aug 23, 2026 15:24	Victor Mercklé	CPPg++14.2.0	Success	5,435
Aug 23, 2026 15:20	Victor Mercklé	CPPg++14.2.0	Success	5,420
Aug 23, 2026 15:17	Victor Mercklé	CPPg++14.2.0	Success	5,615
Aug 23, 2026 15:15	Victor Mercklé	CPPg++14.2.0	Error
Aug 23, 2026 15:10	Victor Mercklé	CPPg++14.2.0	Success	5,450
Aug 23, 2026 15:06	Victor Mercklé	CPPg++14.2.0	Success	5,423
Aug 23, 2026 15:01	Victor Mercklé	CPPg++14.2.0	Success	5,925
Aug 23, 2026 14:56	Victor Mercklé	CPPg++14.2.0	Success	3,280
Aug 23, 2026 14:52	Victor Mercklé	CPPg++14.2.0	Success	2,811
Aug 23, 2026 14:47	Victor Mercklé	CPPg++14.2.0	Success	3,191
Aug 23, 2026 14:39	Victor Mercklé	CPPg++14.2.0	Success	2,833
Aug 23, 2026 14:36	Victor Mercklé	CPPg++14.2.0	Success	2,781
Aug 23, 2026 14:33	Victor Mercklé	CPPg++14.2.0	Success	5,430
Aug 23, 2026 14:31	Victor Mercklé	CPPg++14.2.0	Success	2,856
Aug 23, 2026 14:26	Victor Mercklé	CPPg++14.2.0	Success	5,462
Aug 23, 2026 14:23	Victor Mercklé	CPPg++14.2.0	Success	5,440
Aug 23, 2026 14:19	Victor Mercklé	CPPg++14.2.0	Success	3,007
Aug 23, 2026 14:14	Victor Mercklé	CPPg++14.2.0	Success	3,292
Aug 23, 2026 14:12	Victor Mercklé	CPPg++14.2.0	Success	2,850
Aug 23, 2026 14:06	Victor Mercklé	CPPg++14.2.0	Success	5,393
Aug 23, 2026 14:04	Victor Mercklé	CPPg++14.2.0	Success	2,778
Aug 23, 2026 14:01	Victor Mercklé	CPPg++14.2.0	Success	5,613
Aug 23, 2026 13:56	Victor Mercklé	CPPg++14.2.0	Success	5,392
Aug 23, 2026 13:53	Victor Mercklé	CPPg++14.2.0	Success	5,520
Aug 21, 2026 15:47	Andrew Epstein	CPPg++14.2.0	Success	966,098
Aug 19, 2026 17:44	Victor Mercklé	CPPg++14.2.0	Success	2,790
Aug 19, 2026 17:24	Victor Mercklé	CPPg++14.2.0	Success	5,543
Aug 19, 2026 16:56	Victor Mercklé	CPPg++14.2.0	Success	5,505
Aug 19, 2026 16:40	Victor Mercklé	CPPg++14.2.0	Success	5,422
Aug 19, 2026 16:23	Victor Mercklé	CPPg++14.2.0	Success	2,765
Aug 19, 2026 16:17	Victor Mercklé	CPPg++14.2.0	Success	5,443
Aug 19, 2026 16:14	Victor Mercklé	CPPg++14.2.0	Success	2,771
Aug 19, 2026 16:02	Victor Mercklé	CPPg++14.2.0	Success	5,395
Aug 19, 2026 15:54	Victor Mercklé	CPPg++14.2.0	Success	5,426
Aug 19, 2026 15:51	Victor Mercklé	CPPg++14.2.0	Success	2,763+35.03 RP
Aug 19, 2026 15:47	Victor Mercklé	CPPg++14.2.0	Success	5,449
Aug 19, 2026 15:40	Victor Mercklé	CPPg++14.2.0	Success	5,428
Aug 19, 2026 15:38	Victor Mercklé	CPPg++14.2.0	Success	2,907
Aug 19, 2026 15:37	Victor Mercklé	CPPg++14.2.0	Success	2,974
Aug 19, 2026 15:34	Victor Mercklé	CPPg++14.2.0	Success	5,460
Aug 19, 2026 15:22	Victor Mercklé	CPPg++14.2.0	Success	5,443
Aug 19, 2026 15:19	Victor Mercklé	CPPg++14.2.0	Success	5,487
Aug 19, 2026 15:17	Victor Mercklé	CPPg++14.2.0	Success	5,430
Aug 19, 2026 15:14	Victor Mercklé	CPPg++14.2.0	Success	2,796

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