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 15, 2026 21:40	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 21:39	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 21:34	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 21:32	zielaj	CPPclang++18.1.3	Success	5,365
Apr 15, 2026 21:29	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 21:26	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 21:25	zielaj	CPPclang++18.1.3	Success	5,343
Apr 15, 2026 21:23	zielaj	CPPclang++18.1.3	Success	5,345
Apr 15, 2026 21:20	zielaj	CPPclang++18.1.3	Success	5,358
Apr 15, 2026 21:19	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 21:14	zielaj	CPPclang++18.1.3	Success	5,366
Apr 15, 2026 21:12	zielaj	CPPclang++18.1.3	Success	5,392
Apr 15, 2026 21:11	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 21:10	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 20:51	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 20:49	zielaj	CPPclang++18.1.3	Error	+36.30 RP
Apr 15, 2026 20:47	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 20:40	zielaj	CPPclang++18.1.3	Success	5,340
Apr 15, 2026 20:37	zielaj	CPPclang++18.1.3	Error	+2.48 RP
Apr 15, 2026 20:33	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 12:49	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 12:48	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 12:46	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 02:30	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 02:25	zielaj	CPPclang++18.1.3	Success	5,289
Apr 15, 2026 02:22	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 02:20	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 02:17	zielaj	CPPclang++18.1.3	Success	4,347
Apr 15, 2026 02:13	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 02:12	zielaj	CPPclang++18.1.3	Success	5,370
Apr 15, 2026 02:10	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 02:08	zielaj	CPPclang++18.1.3	Success	5,305
Apr 15, 2026 02:01	zielaj	CPPclang++18.1.3	Success	5,367
Apr 15, 2026 01:56	zielaj	CPPclang++18.1.3	Error	+50.00 RP
Apr 15, 2026 01:50	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 01:49	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 01:35	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 01:34	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 01:32	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 01:30	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 01:21	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 01:20	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 01:10	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:56	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:47	zielaj	CPPclang++18.1.3	Error	+128.51 RP
Apr 15, 2026 00:45	zielaj	CPPclang++18.1.3	Success	5,426
Apr 15, 2026 00:32	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:29	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:23	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:21	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:20	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:15	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:13	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:12	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:10	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:04	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:02	zielaj	CPPclang++18.1.3	Error
Apr 15, 2026 00:00	zielaj	CPPclang++18.1.3	Error
Apr 14, 2026 23:58	zielaj	CPPclang++18.1.3	Error
Apr 14, 2026 23:49	zielaj	CPPclang++18.1.3	Success	5,465
Apr 14, 2026 23:48	zielaj	CPPclang++18.1.3	Success	5,413
Apr 14, 2026 23:27	zielaj	CPPclang++18.1.3	Success	5,609
Apr 14, 2026 23:21	zielaj	CPPclang++18.1.3	Error
Apr 14, 2026 23:17	zielaj	CPPclang++18.1.3	Error
Apr 14, 2026 22:30	zielaj	CPPclang++18.1.3	Error
Apr 14, 2026 04:42	Yuriy Lyfenko	CPPg++13.3.0	Error	+23.82 RP
Apr 14, 2026 04:39	Yuriy Lyfenko	CPPg++13.3.0	Error	+45.60 RP
Apr 14, 2026 04:37	Yuriy Lyfenko	CPPg++13.3.0	Error	+52.07 RP
Apr 14, 2026 04:35	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 04:32	Yuriy Lyfenko	CPPg++13.3.0	Error
Apr 14, 2026 04:28	Yuriy Lyfenko	CPPg++13.3.0	Error	+6.75 RP
Apr 14, 2026 04:24	Yuriy Lyfenko	CPPg++13.3.0	Error
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

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