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 13, 2026 02:15	Josu San Martin	RUSTrust-1.93.0	Success	11,641
Mar 12, 2026 23:42	Viktor Varbanov	CPPg++13.3.0	Success	973,195+10.28 RP
Mar 12, 2026 22:10	Josu San Martin	RUSTrust-1.93.0	Success	11,220
Mar 12, 2026 22:10	Josu San Martin	RUSTrust-1.93.0	Success	11,220
Mar 12, 2026 22:09	Josu San Martin	RUSTrust-1.93.0	Success	11,201
Mar 12, 2026 22:05	Josu San Martin	RUSTrust-1.93.0	Success	3,660
Mar 12, 2026 22:05	Josu San Martin	RUSTrust-1.93.0	Success	3,640
Mar 12, 2026 22:04	Josu San Martin	RUSTrust-1.93.0	Success	11,187
Mar 12, 2026 22:04	Josu San Martin	RUSTrust-1.93.0	Success	3,764
Mar 12, 2026 21:46	Josu San Martin	CPPclang++18.1.3	Error
Mar 12, 2026 21:44	Josu San Martin	RUSTrust-1.93.0	Success	11,140
Mar 12, 2026 21:36	Josu San Martin	RUSTrust-1.93.0	Success	11,223
Mar 12, 2026 21:36	Josu San Martin	RUSTrust-1.93.0	Success	11,275
Mar 12, 2026 21:36	Josu San Martin	RUSTrust-1.93.0	Success	3,405+27.48 RP
Mar 12, 2026 21:36	Josu San Martin	RUSTrust-1.93.0	Success	11,305
Mar 12, 2026 20:39	Josu San Martin	RUSTrust-1.93.0	Success	11,206
Mar 12, 2026 20:36	Josu San Martin	RUSTrust-1.93.0	Success	3,828
Mar 12, 2026 20:35	Josu San Martin	RUSTrust-1.93.0	Success	11,209
Mar 12, 2026 20:35	Josu San Martin	RUSTrust-1.93.0	Success	11,194
Mar 12, 2026 20:35	Josu San Martin	RUSTrust-1.93.0	Error
Mar 12, 2026 20:34	Josu San Martin	RUSTrust-1.93.0	Error
Mar 12, 2026 20:16	Josu San Martin	RUSTrust-1.93.0	Success	11,189
Mar 12, 2026 20:16	Josu San Martin	RUSTrust-1.93.0	Success	11,195
Mar 12, 2026 20:16	Josu San Martin	RUSTrust-1.93.0	Success	17,770
Mar 12, 2026 20:15	Josu San Martin	RUSTrust-1.93.0	Success	12,403
Mar 12, 2026 20:15	Josu San Martin	RUSTrust-1.93.0	Success	11,205
Mar 12, 2026 16:19	Josu San Martin	RUSTrust-1.93.0	Success	4,635
Mar 12, 2026 16:19	Josu San Martin	RUSTrust-1.93.0	Success	15,097
Mar 12, 2026 16:19	Josu San Martin	RUSTrust-1.93.0	Success	4,530
Mar 12, 2026 16:18	Josu San Martin	RUSTrust-1.93.0	Success	4,513
Mar 12, 2026 16:03	Josu San Martin	RUSTrust-1.93.0	Success	4,468
Mar 11, 2026 02:43	Sergey Serebryakov	CPPg++13.3.0	Success	13,458+743.05 RP
Mar 10, 2026 23:22	olliecrow	CPPclang++18.1.3	Success	3,419+8.53 RP
Mar 10, 2026 22:52	olliecrow	CPPclang++18.1.3	Success	9,269
Mar 10, 2026 22:45	olliecrow	CPPclang++18.1.3	Success	18,683
Mar 10, 2026 22:32	olliecrow	CPPclang++18.1.3	Success	3,674
Mar 10, 2026 22:26	olliecrow	CPPclang++18.1.3	Success	18,328
Mar 10, 2026 22:22	olliecrow	CPPclang++18.1.3	Success	3,429+6.79 RP
Mar 10, 2026 22:22	olliecrow	CPPclang++18.1.3	Success	3,437+66.18 RP
Mar 10, 2026 22:21	olliecrow	CPPclang++18.1.3	Success	18,387
Mar 10, 2026 22:16	olliecrow	CPPclang++18.1.3	Success	18,567
Mar 10, 2026 22:08	olliecrow	CPPclang++18.1.3	Success	3,641
Mar 10, 2026 22:06	olliecrow	CPPclang++18.1.3	Success	3,517+54.71 RP
Mar 10, 2026 21:59	olliecrow	CPPclang++18.1.3	Success	3,586+466.82 RP
Mar 10, 2026 21:52	olliecrow	CPPclang++18.1.3	Success	4,307+1'019.21 RP
Mar 10, 2026 21:51	olliecrow	CPPclang++18.1.3	Success	10,220
Mar 10, 2026 21:33	olliecrow	CPPclang++18.1.3	Success	7,677+307.67 RP
Mar 10, 2026 21:20	olliecrow	CPPclang++18.1.3	Success	10,051+16.45 RP
Mar 10, 2026 21:16	olliecrow	CPPclang++18.1.3	Success	10,315
Mar 10, 2026 21:10	olliecrow	CPPclang++18.1.3	Success	10,320
Mar 10, 2026 21:05	olliecrow	RUSTrust-1.94.0	Success	15,644
Mar 10, 2026 21:00	olliecrow	CPPclang++18.1.3	Success	10,220+5.99 RP
Mar 10, 2026 20:58	olliecrow	CPPclang++18.1.3	Success	10,283+16.82 RP
Mar 10, 2026 20:57	olliecrow	RUSTrust-1.94.0	Success	15,781
Mar 10, 2026 20:53	olliecrow	CPPclang++18.1.3	Success	15,092
Mar 10, 2026 20:53	olliecrow	RUSTrust-1.94.0	Success	10,755
Mar 10, 2026 20:42	olliecrow	CPPclang++18.1.3	Success	15,576
Mar 10, 2026 20:39	olliecrow	RUSTrust-1.94.0	Success	12,045
Mar 10, 2026 20:37	olliecrow	CPPclang++18.1.3	Success	10,464+42.50 RP
Mar 10, 2026 20:34	olliecrow	CPPclang++18.1.3	Success	11,318
Mar 10, 2026 20:30	olliecrow	CPPclang++18.1.3	Success	10,951+79.83 RP
Mar 10, 2026 20:28	olliecrow	RUSTrust-1.94.0	Success	17,557
Mar 10, 2026 20:25	olliecrow	RUSTrust-1.94.0	Success	16,478
Mar 10, 2026 20:21	olliecrow	RUSTrust-1.94.0	Success	19,546
Mar 10, 2026 13:06	olliecrow	CPPclang++18.1.3	Error
Mar 10, 2026 13:05	olliecrow	CPPclang++18.1.3	Error
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

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