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
Sep 19, 2026 19:56	Andrew Epstein	CPPclang++20.1.2	Success	68,254
Sep 19, 2026 19:55	Andrew Epstein	CPPclang++20.1.2	Success	73,334
Sep 19, 2026 19:48	Andrew Epstein	CPPclang++20.1.2	Success	127,230
Sep 19, 2026 19:46	Andrew Epstein	CPPclang++20.1.2	Success	17,718
Sep 19, 2026 19:45	Andrew Epstein	CPPclang++20.1.2	Success	32,021
Sep 19, 2026 19:41	Andrew Epstein	CPPclang++20.1.2	Success	44,951
Sep 19, 2026 19:39	Andrew Epstein	CPPclang++20.1.2	Success	40,039
Sep 19, 2026 19:34	Andrew Epstein	CPPclang++20.1.2	Success	17,205
Sep 19, 2026 19:31	Andrew Epstein	CPPclang++20.1.2	Success	17,347
Sep 19, 2026 19:30	Andrew Epstein	CPPclang++20.1.2	Success	17,794
Sep 19, 2026 19:28	Andrew Epstein	CPPg++14.2.0	Success	24,844
Sep 19, 2026 19:27	Andrew Epstein	CPPclang++20.1.2	Success	15,980
Sep 19, 2026 19:26	Andrew Epstein	CPPclang++20.1.2	Success	17,218
Sep 19, 2026 19:22	Andrew Epstein	CPPclang++20.1.2	Success	23,002
Sep 19, 2026 19:22	Andrew Epstein	CPPclang++20.1.2	Success	3,011
Sep 19, 2026 19:20	Andrew Epstein	CPPclang++20.1.2	Success	69,888
Sep 19, 2026 19:17	Andrew Epstein	CPPclang++20.1.2	Success	45,790
Sep 19, 2026 19:13	Andrew Epstein	CPPclang++20.1.2	Success	30,820
Sep 19, 2026 19:11	Andrew Epstein	CPPclang++20.1.2	Success	39,474
Sep 19, 2026 19:08	Andrew Epstein	CPPclang++20.1.2	Success	20,419
Sep 19, 2026 18:41	Andrew Epstein	CPPclang++20.1.2	Success	2,707
Sep 19, 2026 18:41	Andrew Epstein	CPPclang++20.1.2	Success	2,680+67.00 RP
Sep 19, 2026 18:38	Andrew Epstein	CPPclang++20.1.2	Success	17,193
Sep 19, 2026 18:37	Andrew Epstein	CPPclang++20.1.2	Success	17,733
Sep 19, 2026 18:30	Andrew Epstein	CPPclang++20.1.2	Success	17,248
Sep 19, 2026 18:27	Andrew Epstein	CPPclang++20.1.2	Success	17,228
Sep 19, 2026 18:26	Andrew Epstein	CPPclang++20.1.2	Success	39,136
Sep 19, 2026 18:23	Andrew Epstein	CPPclang++20.1.2	Success	17,774
Sep 19, 2026 18:20	Andrew Epstein	CPPclang++20.1.2	Success	33,997
Sep 19, 2026 18:19	Andrew Epstein	CPPclang++20.1.2	Success	34,048
Sep 19, 2026 18:18	Andrew Epstein	CPPclang++20.1.2	Success	17,242
Sep 19, 2026 18:17	Andrew Epstein	CPPclang++20.1.2	Success	31,560
Sep 19, 2026 18:13	Andrew Epstein	CPPclang++20.1.2	Success	20,610
Sep 19, 2026 18:12	Andrew Epstein	CPPclang++20.1.2	Success	39,455
Sep 19, 2026 18:11	Andrew Epstein	CPPclang++20.1.2	Success	59,433
Sep 19, 2026 18:07	Andrew Epstein	CPPclang++20.1.2	Success	45,376
Sep 19, 2026 18:04	Andrew Epstein	CPPclang++20.1.2	Success	2,739
Sep 19, 2026 17:50	Andrew Epstein	CPPg++14.2.0	Success	2,732
Sep 19, 2026 17:45	Andrew Epstein	CPPclang++20.1.2	Success	31,079
Sep 19, 2026 17:40	Andrew Epstein	CPPclang++20.1.2	Success	13,031
Sep 19, 2026 17:35	Andrew Epstein	CPPclang++20.1.2	Success	32,750
Sep 19, 2026 17:33	Andrew Epstein	CPPclang++20.1.2	Success	2,729+37.21 RP
Sep 19, 2026 17:31	Andrew Epstein	CPPclang++20.1.2	Success	17,719
Sep 19, 2026 17:30	Andrew Epstein	CPPclang++20.1.2	Success	23,028
Sep 19, 2026 17:24	Andrew Epstein	CPPclang++20.1.2	Success	23,430
Sep 19, 2026 17:22	Andrew Epstein	CPPclang++20.1.2	Success	2,757+239.60 RP
Sep 19, 2026 17:19	Andrew Epstein	CPPclang++20.1.2	Success	25,604
Sep 19, 2026 15:40	Andrew Epstein	CPPclang++20.1.2	Success	17,197
Sep 19, 2026 15:37	Andrew Epstein	CPPclang++20.1.2	Success	25,131
Sep 19, 2026 15:36	Andrew Epstein	CPPclang++20.1.2	Success	19,851
Sep 19, 2026 15:36	Andrew Epstein	CPPclang++20.1.2	Success	19,982
Sep 19, 2026 15:32	Andrew Epstein	CPPclang++20.1.2	Success	23,188
Sep 19, 2026 15:30	Andrew Epstein	CPPclang++20.1.2	Success	3,004
Sep 19, 2026 15:29	Andrew Epstein	CPPclang++20.1.2	Success	24,169
Sep 19, 2026 15:27	Andrew Epstein	CPPclang++20.1.2	Success	2,971
Sep 19, 2026 15:25	Andrew Epstein	CPPclang++20.1.2	Success	29,779
Sep 19, 2026 15:24	Andrew Epstein	CPPg++14.2.0	Success	3,007
Sep 19, 2026 15:23	Andrew Epstein	CPPclang++20.1.2	Success	2,952+1'391.92 RP
Sep 19, 2026 15:18	Andrew Epstein	CPPclang++20.1.2	Success	30,530
Sep 19, 2026 15:15	Andrew Epstein	CPPclang++20.1.2	Success	29,598
Sep 19, 2026 15:13	Andrew Epstein	CPPclang++20.1.2	Success	39,538
Sep 19, 2026 15:07	Andrew Epstein	CPPclang++20.1.2	Success	44,868
Sep 19, 2026 14:57	Andrew Epstein	CPPclang++20.1.2	Success	27,798
Sep 19, 2026 13:37	Andrew Epstein	CPPg++14.2.0	Success	19,222
Sep 19, 2026 13:27	Andrew Epstein	CPPg++14.2.0	Success	6,098
Sep 19, 2026 13:23	Andrew Epstein	CPPg++14.2.0	Success	161,307
Sep 18, 2026 01:49	Andrew Epstein	CPPclang++20.1.2	Success	5,011+57.25 RP
Sep 12, 2026 20:47	SparkyRobin	CPPg++10.5.0	Success	111,234+79.96 RP
Sep 12, 2026 20:26	SparkyRobin	CPPg++10.5.0	Success	1,005,692+14.94 RP
Sep 12, 2026 08:04	Haha Expert	CPPg++14.2.0	Error
Sep 12, 2026 08:01	Haha Expert	CPPg++14.2.0	Success	32,051+0.17 RP
Sep 12, 2026 07:58	Haha Expert	CPPg++14.2.0	Success	32,068+0.54 RP
Sep 12, 2026 07:55	Haha Expert	CPPg++14.2.0	Error
Sep 12, 2026 07:45	Haha Expert	CPPg++14.2.0	Success	54,410
Sep 12, 2026 07:43	Haha Expert	CPPg++14.2.0	Success	32,124+213.68 RP
Sep 12, 2026 07:40	Haha Expert	CPPg++14.2.0	Success	104,431
Sep 12, 2026 07:37	Haha Expert	CPPg++14.2.0	Success	102,442+3.12 RP
Sep 12, 2026 07:30	Haha Expert	CPPg++14.2.0	Success	105,821+8.31 RP
Sep 10, 2026 03:13	Andrew Epstein	CPPclang++20.1.2	Success	5,159+223.09 RP
Sep 10, 2026 03:07	Andrew Epstein	CPPclang++20.1.2	Success	5,830+1'180.05 RP
Sep 10, 2026 03:00	Andrew Epstein	CPPclang++20.1.2	Success	18,684+146.19 RP
Sep 9, 2026 13:37	Victor Mercklé	CPPg++14.2.0	Success	2,565
Sep 8, 2026 20:41	Victor Mercklé	CPPg++14.2.0	Success	2,749
Sep 8, 2026 20:35	Victor Mercklé	CPPg++14.2.0	Success	2,629
Sep 8, 2026 20:31	Victor Mercklé	CPPg++14.2.0	Success	2,674
Sep 8, 2026 20:29	Victor Mercklé	CPPg++14.2.0	Success	2,556+3.06 RP
Sep 8, 2026 20:26	Victor Mercklé	CPPg++14.2.0	Success	2,617
Sep 8, 2026 20:22	Victor Mercklé	CPPg++14.2.0	Success	2,617
Sep 8, 2026 20:14	Victor Mercklé	CPPg++14.2.0	Success	2,669
Sep 8, 2026 20:10	Victor Mercklé	CPPg++14.2.0	Success	2,626
Sep 8, 2026 20:03	Victor Mercklé	CPPg++14.2.0	Success	2,638
Sep 8, 2026 19:57	Victor Mercklé	CPPg++14.2.0	Success	2,630
Sep 8, 2026 19:51	Victor Mercklé	CPPg++14.2.0	Success	2,625
Sep 8, 2026 19:43	Victor Mercklé	CPPg++14.2.0	Success	2,655
Sep 8, 2026 19:32	Victor Mercklé	CPPg++14.2.0	Success	2,565
Sep 8, 2026 19:26	Victor Mercklé	CPPg++14.2.0	Success	2,658
Sep 8, 2026 19:20	Victor Mercklé	CPPg++14.2.0	Success	2,652
Sep 8, 2026 19:14	Victor Mercklé	CPPg++14.2.0	Success	2,647
Sep 8, 2026 19:02	Victor Mercklé	CPPg++14.2.0	Success	2,649
Sep 8, 2026 18:56	Victor Mercklé	CPPg++14.2.0	Success	2,567

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