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
Mar 10, 2026 13:00	olliecrow	CPPclang++18.1.3	Success	15,209
Mar 10, 2026 12:55	olliecrow	CPPclang++18.1.3	Success	12,000+0.28 RP
Mar 10, 2026 06:38	olliecrow	CPPclang++18.1.3	Error
Mar 10, 2026 06:29	olliecrow	CPPclang++18.1.3	Error
Mar 10, 2026 06:02	olliecrow	RUSTrust-1.94.0	Success	12,695
Mar 10, 2026 06:00	olliecrow	RUSTrust-1.94.0	Success	12,072
Mar 10, 2026 05:54	olliecrow	RUSTrust-1.94.0	Success	12,048
Mar 10, 2026 05:06	olliecrow	CPPclang++18.1.3	Success	12,004+0.21 RP
Mar 10, 2026 04:49	olliecrow	CPPclang++18.1.3	Error
Mar 10, 2026 04:31	olliecrow	CPPclang++18.1.3	Success	12,007+0.62 RP
Mar 10, 2026 04:24	olliecrow	CPPclang++18.1.3	Success	12,016+8.50 RP
Mar 10, 2026 04:09	olliecrow	CPPclang++18.1.3	Success	15,098
Mar 10, 2026 04:06	olliecrow	CPPg++13.3.0	Success	977,381
Mar 5, 2026 22:31	Sergey Serebryakov	CPPg++13.3.0	Error
Mar 5, 2026 19:34	olliecrow	CPPclang++18.1.3	Error
Mar 5, 2026 19:19	olliecrow	CPPclang++18.1.3	Error
Mar 5, 2026 19:03	olliecrow	CPPclang++18.1.3	Error
Mar 5, 2026 19:00	olliecrow	CPPclang++18.1.3	Error
Mar 5, 2026 18:58	olliecrow	CPPclang++18.1.3	Error
Mar 5, 2026 12:58	Ham-Ham	CPPg++13.3.0	Error
Mar 5, 2026 00:08	olliecrow	CPPclang++18.1.3	Error
Mar 5, 2026 00:05	olliecrow	CPPclang++18.1.3	Error
Mar 5, 2026 00:01	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 23:58	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 23:53	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 23:49	olliecrow	CPPclang++18.1.3	Success	17,649
Mar 4, 2026 23:46	olliecrow	CPPclang++18.1.3	Success	22,455
Mar 4, 2026 23:42	olliecrow	CPPclang++18.1.3	Success	22,964
Mar 4, 2026 23:34	olliecrow	CPPclang++18.1.3	Success	12,142
Mar 4, 2026 23:31	olliecrow	CPPclang++18.1.3	Success	12,203
Mar 4, 2026 23:17	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 23:05	olliecrow	CPPclang++18.1.3	Success	18,386
Mar 4, 2026 23:01	olliecrow	CPPclang++18.1.3	Success	12,161
Mar 4, 2026 22:51	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 22:47	olliecrow	CPPclang++18.1.3	Success	12,235
Mar 4, 2026 22:42	olliecrow	CPPclang++18.1.3	Success	12,140+0.20 RP
Mar 4, 2026 22:38	olliecrow	CPPclang++18.1.3	Success	12,646
Mar 4, 2026 17:12	olliecrow	CPPclang++18.1.3	Success	12,164
Mar 4, 2026 17:04	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 17:00	olliecrow	CPPclang++18.1.3	Success	12,146
Mar 4, 2026 16:52	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 16:40	olliecrow	CPPclang++18.1.3	Success	12,160
Mar 4, 2026 16:27	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 16:22	olliecrow	CPPclang++18.1.3	Success	12,160
Mar 4, 2026 16:04	olliecrow	CPPclang++18.1.3	Success	12,159
Mar 4, 2026 15:58	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 15:53	olliecrow	CPPclang++18.1.3	Success	12,160
Mar 4, 2026 15:29	olliecrow	CPPclang++18.1.3	Success	12,164
Mar 4, 2026 15:23	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 15:17	olliecrow	CPPclang++18.1.3	Success	12,143+0.07 RP
Mar 4, 2026 15:11	olliecrow	CPPclang++18.1.3	Success	12,162
Mar 4, 2026 15:00	olliecrow	CPPclang++18.1.3	Success	12,153
Mar 4, 2026 14:54	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 14:48	olliecrow	CPPclang++18.1.3	Success	12,160
Mar 4, 2026 14:38	Haha Expert	CSHARP9.0.13	Success	121,311
Mar 4, 2026 14:34	olliecrow	CPPclang++18.1.3	Success	12,160
Mar 4, 2026 14:30	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 14:27	olliecrow	CPPclang++18.1.3	Success	12,161
Mar 4, 2026 07:32	olliecrow	CPPclang++18.1.3	Success	12,161
Mar 4, 2026 07:18	olliecrow	CPPclang++18.1.3	Success	12,144
Mar 4, 2026 07:02	olliecrow	CPPclang++18.1.3	Success	12,744
Mar 4, 2026 06:58	olliecrow	CPPclang++18.1.3	Success	12,159
Mar 4, 2026 06:56	olliecrow	CPPg++13.3.0	Success	15,898
Mar 4, 2026 06:43	olliecrow	CPPclang++18.1.3	Success	12,491
Mar 4, 2026 06:38	olliecrow	CPPclang++18.1.3	Success	12,283
Mar 4, 2026 06:28	olliecrow	CPPclang++18.1.3	Success	16,081
Mar 4, 2026 06:10	olliecrow	CPPclang++18.1.3	Success	12,144+1.42 RP
Mar 4, 2026 06:05	olliecrow	CPPclang++18.1.3	Success	18,308
Mar 4, 2026 05:58	olliecrow	CPPclang++18.1.3	Error
Mar 4, 2026 05:52	olliecrow	CPPclang++18.1.3	Success	12,173
Mar 4, 2026 05:38	olliecrow	CPPclang++18.1.3	Success	12,165
Mar 4, 2026 05:33	olliecrow	CPPclang++18.1.3	Success	12,165+0.54 RP
Mar 4, 2026 05:19	olliecrow	CPPclang++18.1.3	Success	12,173
Mar 4, 2026 05:12	olliecrow	CPPclang++18.1.3	Success	12,173+2.96 RP
Mar 4, 2026 05:04	olliecrow	CPPclang++18.1.3	Success	12,220
Mar 4, 2026 04:58	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 04:53	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 04:34	olliecrow	CPPclang++18.1.3	Success	12,301
Mar 4, 2026 04:24	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 04:18	olliecrow	CPPclang++18.1.3	Success	12,221
Mar 4, 2026 04:14	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 04:09	olliecrow	CPPclang++18.1.3	Success	12,220
Mar 4, 2026 03:47	olliecrow	CPPg++13.3.0	Success	13,114
Mar 4, 2026 03:40	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 03:32	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 03:28	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 03:24	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 03:11	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 03:03	olliecrow	CPPclang++18.1.3	Success	12,377
Mar 4, 2026 02:48	olliecrow	CPPclang++18.1.3	Success	12,217+0.54 RP
Mar 4, 2026 02:40	olliecrow	CPPclang++18.1.3	Success	12,227
Mar 4, 2026 02:36	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 02:29	olliecrow	CPPclang++18.1.3	Success	15,626
Mar 4, 2026 02:24	olliecrow	CPPclang++18.1.3	Success	15,273
Mar 4, 2026 02:19	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 02:11	olliecrow	CPPclang++18.1.3	Success	12,230
Mar 4, 2026 01:57	Josu San Martin	CSHARP9.0.13	Success	13,415
Mar 4, 2026 01:32	olliecrow	CPPclang++18.1.3	Success	12,250
Mar 4, 2026 01:11	olliecrow	CPPclang++18.1.3	Success	12,701
Mar 4, 2026 01:04	olliecrow	CPPclang++18.1.3	Success	12,230

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