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
Jul 10, 2025 23:35	Valentin Kofman	CPPclang++18.1.3	Error
Jul 10, 2025 23:34	Valentin Kofman	CPPclang++18.1.3	Success	6,996
Jul 10, 2025 23:31	Valentin Kofman	CPPclang++18.1.3	Success	7,362
Jul 10, 2025 22:46	Valentin Kofman	CPPclang++18.1.3	Success	7,732
Jul 10, 2025 22:39	Valentin Kofman	CPPclang++18.1.3	Success	7,975
Jul 10, 2025 22:10	Valentin Kofman	CPPclang++18.1.3	Success	7,138
Jul 10, 2025 22:09	Valentin Kofman	CPPclang++18.1.3	Success	7,294
Jul 10, 2025 22:06	Valentin Kofman	CPPclang++18.1.3	Success	7,291
Jul 10, 2025 22:05	Valentin Kofman	CPPclang++18.1.3	Error
Jul 10, 2025 21:37	Valentin Kofman	CPPclang++18.1.3	Error
Jul 10, 2025 21:08	Valentin Kofman	CPPclang++18.1.3	Success	4,879+137.19 RP
Jul 10, 2025 21:06	Valentin Kofman	CPPclang++18.1.3	Error
Jul 10, 2025 21:04	Valentin Kofman	CPPclang++18.1.3	Error
Jul 9, 2025 20:36	Valentin Kofman	CPPclang++18.1.3	Success	5,264
Jul 9, 2025 20:34	Valentin Kofman	CPPclang++18.1.3	Error
Jul 9, 2025 20:33	Valentin Kofman	CPPclang++18.1.3	Success	5,477
Jul 9, 2025 20:01	Valentin Kofman	CPPclang++18.1.3	Success	7,092
Jul 9, 2025 19:58	Valentin Kofman	CPPclang++18.1.3	Success	7,364
Jul 9, 2025 19:43	Valentin Kofman	CPPclang++18.1.3	Success	7,046
Jul 9, 2025 19:36	Valentin Kofman	CPPclang++18.1.3	Success	7,167
Jul 9, 2025 19:20	Valentin Kofman	CPPclang++18.1.3	Success	7,312
Jul 9, 2025 10:05	Valentin Kofman	CPPclang++18.1.3	Success	7,247
Jul 9, 2025 10:01	Valentin Kofman	CPPclang++18.1.3	Error
Jul 9, 2025 09:53	Valentin Kofman	CPPg++13.3.0	Error
Jul 9, 2025 09:48	Valentin Kofman	CPPg++13.3.0	Error
Jul 9, 2025 09:37	Valentin Kofman	CPPclang++18.1.3	Error
Jul 9, 2025 09:30	Valentin Kofman	CPPclang++18.1.3	Error
Jul 9, 2025 08:51	Valentin Kofman	CPPclang++18.1.3	Success	7,335
Jul 9, 2025 08:47	Valentin Kofman	CPPclang++18.1.3	Success	5,229+43.25 RP
Jul 9, 2025 08:46	Valentin Kofman	CPPclang++18.1.3	Success	7,042
Jul 9, 2025 08:43	Valentin Kofman	CPPclang++18.1.3	Error
Jul 9, 2025 00:03	Valentin Kofman	CPPclang++18.1.3	Error
Jul 9, 2025 00:03	Valentin Kofman	CPPclang++18.1.3	Success	7,103
Jul 8, 2025 23:52	Valentin Kofman	CPPg++13.3.0	Success	7,249
Jul 8, 2025 23:37	Valentin Kofman	CPPg++13.3.0	Success	7,255
Jul 8, 2025 23:36	Valentin Kofman	CPPg++13.3.0	Success	7,171
Jul 8, 2025 23:09	Valentin Kofman	CPPg++13.3.0	Success	7,159
Jul 8, 2025 23:08	Valentin Kofman	CPPg++13.3.0	Error
Jul 8, 2025 22:57	Valentin Kofman	CPPclang++18.1.3	Success	5,606
Jul 8, 2025 22:55	Valentin Kofman	CPPg++13.3.0	Error
Jul 8, 2025 22:55	Valentin Kofman	CPPg++13.3.0	Success	5,404
Jul 8, 2025 22:54	Valentin Kofman	CPPg++13.3.0	Error
Jul 8, 2025 22:53	Valentin Kofman	CPPg++13.3.0	Success	7,416
Jul 8, 2025 22:49	Valentin Kofman	CPPclang++18.1.3	Error
Jul 8, 2025 22:47	Valentin Kofman	CPPclang++18.1.3	Error
Jul 8, 2025 22:46	Valentin Kofman	CPPg++13.3.0	Error
Jul 8, 2025 22:00	Valentin Kofman	CPPg++13.3.0	Success	5,350+654.53 RP
Jul 8, 2025 21:54	Valentin Kofman	CPPg++13.3.0	Success	8,233+146.13 RP
Jul 8, 2025 21:52	Valentin Kofman	CPPg++13.3.0	Error
Jul 8, 2025 20:03	Adam Folwarczny	CPPg++13.3.0	Success	120,651
Jul 8, 2025 19:59	Adam Folwarczny	CPPg++13.3.0	Success	10,510
Jul 8, 2025 19:58	Adam Folwarczny	CPPg++13.3.0	Success	125,954
Jul 8, 2025 19:51	Adam Folwarczny	CPPg++13.3.0	Success	110,159
Jul 8, 2025 19:48	Adam Folwarczny	CPPg++13.3.0	Success	107,692
Jul 8, 2025 19:32	Adam Folwarczny	CPPg++13.3.0	Success	9,190+470.09 RP
Jul 8, 2025 19:31	Adam Folwarczny	CPPg++13.3.0	Success	103,876
Jul 8, 2025 19:23	Adam Folwarczny	CPPg++13.3.0	Success	16,180+0.11 RP
Jul 8, 2025 19:20	Adam Folwarczny	CPPg++13.3.0	Success	104,027
Jul 8, 2025 19:18	Adam Folwarczny	CPPg++13.3.0	Success	16,183+32.35 RP
Jul 8, 2025 19:17	Adam Folwarczny	CPPg++13.3.0	Error
Jul 8, 2025 19:16	Adam Folwarczny	CPPg++13.3.0	Error
Jul 8, 2025 19:14	Adam Folwarczny	CPPg++13.3.0	Error
Jul 8, 2025 19:13	Adam Folwarczny	CPPg++13.3.0	Success	17,077+51.00 RP
Jul 7, 2025 23:59	Valentin Kofman	CPPg++13.3.0	Error
Jul 7, 2025 23:42	Valentin Kofman	CPPg++13.3.0	Success	10,236
Jul 7, 2025 23:41	Valentin Kofman	CPPg++13.3.0	Success	9,710
Jul 7, 2025 23:39	Valentin Kofman	CPPg++13.3.0	Error
Jul 7, 2025 23:34	Valentin Kofman	CPPg++13.3.0	Error
Jul 7, 2025 22:49	Valentin Kofman	CPPg++13.3.0	Success	9,438
Jul 7, 2025 22:43	Valentin Kofman	CPPg++13.3.0	Success	9,477
Jul 7, 2025 22:42	Valentin Kofman	CPPg++13.3.0	Success	9,360
Jul 7, 2025 22:41	Valentin Kofman	CPPclang++18.1.3	Success	9,783
Jul 7, 2025 22:02	Valentin Kofman	CPPclang++18.1.3	Success	9,796
Jul 7, 2025 21:40	Valentin Kofman	CPPclang++18.1.3	Success	9,783
Jul 7, 2025 21:38	Valentin Kofman	CPPg++13.3.0	Success	9,362
Jul 7, 2025 21:32	Valentin Kofman	CPPg++13.3.0	Success	9,359+2.05 RP
Jul 7, 2025 21:07	Valentin Kofman	CPPg++13.3.0	Success	9,629
Jul 7, 2025 20:47	Valentin Kofman	CPPg++13.3.0	Success	9,377+80.25 RP
Jul 7, 2025 20:28	Valentin Kofman	CPPg++13.3.0	Error
Jul 7, 2025 10:45	Valentin Kofman	CPPg++13.3.0	Success	15,833
Jul 7, 2025 10:40	Valentin Kofman	CPPg++13.3.0	Error
Jul 7, 2025 10:35	Valentin Kofman	CPPg++13.3.0	Error
Jul 7, 2025 10:08	Valentin Kofman	CPPg++13.3.0	Success	10,140+7.24 RP
Jul 7, 2025 10:03	Valentin Kofman	CPPg++13.3.0	Success	10,461
Jul 7, 2025 09:59	Valentin Kofman	CPPg++13.3.0	Success	10,215+284.46 RP
Jul 7, 2025 09:48	Valentin Kofman	CPPg++13.3.0	Success	14,399+7.44 RP
Jul 7, 2025 09:26	Valentin Kofman	CPPg++13.3.0	Success	14,555+2.31 RP
Jul 7, 2025 09:15	Valentin Kofman	CPPclang++18.1.3	Success	14,739
Jul 7, 2025 09:14	Valentin Kofman	CPPg++13.3.0	Success	14,604+35.18 RP
Jul 7, 2025 09:13	Valentin Kofman	CPPg++13.3.0	Success	17,651
Jul 7, 2025 09:07	Valentin Kofman	CPPg++13.3.0	Success	20,988
Jul 7, 2025 09:06	Valentin Kofman	CPPg++13.3.0	Success	20,930
Jul 6, 2025 23:38	Valentin Kofman	CPPclang++18.1.3	Success	15,395+0.21 RP
Jul 6, 2025 23:37	Valentin Kofman	CPPclang++18.1.3	Success	16,675
Jul 6, 2025 23:24	Valentin Kofman	CPPclang++18.1.3	Success	15,767
Jul 6, 2025 21:33	Valentin Kofman	CPPclang++18.1.3	Success	15,512
Jul 6, 2025 21:31	Valentin Kofman	CPPclang++18.1.3	Success	15,913
Jul 6, 2025 21:26	Valentin Kofman	CPPclang++18.1.3	Error
Jul 6, 2025 21:23	Valentin Kofman	CPPclang++18.1.3	Success	15,623
Jul 6, 2025 21:20	Valentin Kofman	CPPclang++18.1.3	Success	15,400+2.06 RP

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