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
Oct 9, 2026 11:38	Karthik Reddy	ZIG0.15.1	Success	2,536
Oct 9, 2026 11:38	Karthik Reddy	RUSTrust-1.95.0	Success	2,540
Oct 9, 2026 10:43	Karthik Reddy	GOgo1.26.2	Success	2,543
Oct 9, 2026 10:43	Karthik Reddy	ZIG0.15.1	Success	2,535
Oct 9, 2026 10:42	Karthik Reddy	RUSTrust-1.95.0	Success	2,537
Oct 9, 2026 10:08	Karthik Reddy	CPPclang++18.1.3	Success	2,535
Oct 9, 2026 08:50	Karthik Reddy	ZIG0.15.1	Success	2,541
Oct 9, 2026 08:48	Karthik Reddy	RUSTrust-1.95.0	Success	2,542
Oct 9, 2026 08:16	Karthik Reddy	GOgo1.26.2	Success	2,542
Oct 9, 2026 08:12	Karthik Reddy	RUSTrust-1.95.0	Success	2,542
Oct 9, 2026 08:03	Karthik Reddy	ZIG0.15.1	Success	2,535
Oct 9, 2026 07:14	Karthik Reddy	RUSTrust-1.95.0	Success	2,542
Oct 9, 2026 04:10	highload-churner	CPPclang++18.1.3	Success	5,228+94.26 RP
Oct 9, 2026 04:02	highload-churner	CPPclang++18.1.3	Success	5,499+4.29 RP
Oct 9, 2026 03:47	highload-churner	CPPclang++18.1.3	Success	5,512+1'366.66 RP
Oct 9, 2026 03:44	highload-churner	CPPclang++18.1.3	Success	27,862
Oct 9, 2026 03:38	highload-churner	CPPclang++18.1.3	Success	27,141
Oct 9, 2026 03:33	highload-churner	CPPclang++18.1.3	Success	23,042
Oct 9, 2026 03:31	highload-churner	CPPclang++18.1.3	Success	22,343+12.50 RP
Oct 9, 2026 03:27	highload-churner	CPPclang++18.1.3	Success	22,985+435.07 RP
Oct 6, 2026 08:01	janwww	CPPg++14.2.0	Success	969,201+10.32 RP
Oct 3, 2026 01:52	Karthik Reddy	CPPclang++18.1.3	Success	2,493
Oct 3, 2026 01:50	Karthik Reddy	CPPclang++18.1.3	Success	2,493
Oct 3, 2026 01:49	Karthik Reddy	CPPclang++18.1.3	Success	2,494
Oct 3, 2026 01:48	Karthik Reddy	CPPclang++18.1.3	Success	2,492+9.66 RP
Oct 3, 2026 01:44	Karthik Reddy	CPPclang++18.1.3	Success	2,495+233.00 RP
Oct 3, 2026 01:43	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:37	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:36	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:34	Karthik Reddy	CPPclang++18.1.3	Success	2,629+2.89 RP
Oct 3, 2026 01:33	Karthik Reddy	CPPclang++18.1.3	Success	2,675
Oct 3, 2026 01:32	Karthik Reddy	CPPclang++18.1.3	Success	2,639
Oct 3, 2026 01:31	Karthik Reddy	CPPclang++18.1.3	Success	2,631+38.61 RP
Oct 3, 2026 01:29	Karthik Reddy	CPPclang++18.1.3	Success	102,845
Oct 3, 2026 01:28	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:27	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:24	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:22	Karthik Reddy	CPPclang++18.1.3	Success	2,689
Oct 3, 2026 01:21	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:20	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:19	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:18	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 01:16	Karthik Reddy	CPPclang++18.1.3	Success	2,658+23.91 RP
Oct 3, 2026 01:15	Karthik Reddy	CPPclang++18.1.3	Success	2,705
Oct 3, 2026 01:06	Karthik Reddy	CPPclang++18.1.3	Success	2,712
Oct 3, 2026 01:03	Karthik Reddy	CPPclang++18.1.3	Success	2,678
Oct 3, 2026 01:00	Karthik Reddy	CPPclang++18.1.3	Success	2,684
Oct 3, 2026 00:54	Karthik Reddy	CPPclang++18.1.3	Success	2,675+204.75 RP
Oct 3, 2026 00:42	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 00:40	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 00:39	Karthik Reddy	CPPclang++18.1.3	Success	2,852
Oct 3, 2026 00:37	Karthik Reddy	CPPclang++18.1.3	Success	2,830+200.24 RP
Oct 3, 2026 00:26	Karthik Reddy	CPPclang++18.1.3	Success	3,238
Oct 3, 2026 00:16	Karthik Reddy	CPPclang++18.1.3	Error
Oct 3, 2026 00:13	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 23:47	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 23:46	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 23:41	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 23:41	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 23:32	Karthik Reddy	CPPclang++18.1.3	Success	5,181
Oct 2, 2026 23:30	Karthik Reddy	CPPclang++18.1.3	Success	3,011
Oct 2, 2026 23:26	Karthik Reddy	CPPclang++18.1.3	Success	3,358
Oct 2, 2026 23:05	Karthik Reddy	CPPclang++18.1.3	Success	29,225
Oct 2, 2026 22:57	Karthik Reddy	CPPclang++18.1.3	Success	3,000+131.28 RP
Oct 2, 2026 22:54	Karthik Reddy	CPPclang++18.1.3	Success	3,123+2'873.93 RP
Oct 2, 2026 22:45	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 22:36	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 22:07	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 22:05	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 22:04	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 22:03	Karthik Reddy	CPPclang++18.1.3	Error
Oct 2, 2026 21:53	Karthik Reddy	CPPclang++18.1.3	Success	30,477+328.12 RP
Oct 2, 2026 07:31	C21	CPPclang++20.1.2	Success	3,306+8.21 RP
Oct 1, 2026 21:26	C21	CPPclang++20.1.2	Success	3,343
Oct 1, 2026 21:19	C21	CPPclang++20.1.2	Success	4,312
Oct 1, 2026 21:08	C21	CPPclang++20.1.2	Success	4,344
Oct 1, 2026 21:04	C21	CPPclang++20.1.2	Success	3,332
Oct 1, 2026 21:01	C21	CPPclang++20.1.2	Success	4,305
Oct 1, 2026 20:53	C21	CPPclang++20.1.2	Error
Oct 1, 2026 17:12	C21	CPPclang++20.1.2	Error
Oct 1, 2026 16:49	C21	CPPclang++20.1.2	Success	3,315+84.04 RP
Oct 1, 2026 16:46	C21	CPPclang++20.1.2	Success	3,410+189.07 RP
Oct 1, 2026 16:41	C21	CPPclang++20.1.2	Success	3,717
Oct 1, 2026 15:20	Nico	CPPg++10.5.0	Success	5,992+1'345.90 RP
Oct 1, 2026 14:47	Nico	CPPg++14.2.0	Success	30,961+312.98 RP
Oct 1, 2026 14:04	Nico	CPPg++10.5.0	Success	998,819+10.01 RP
Sep 29, 2026 08:35	C21	CPPclang++20.1.2	Success	3,655
Sep 29, 2026 08:21	C21	CPPclang++20.1.2	Success	3,645+385.55 RP
Sep 29, 2026 08:14	C21	CPPclang++20.1.2	Success	4,241+411.65 RP
Sep 28, 2026 20:23	C21	CPPclang++20.1.2	Success	5,555
Sep 28, 2026 19:45	C21	CPPclang++20.1.2	Success	5,138+1'266.89 RP
Sep 28, 2026 19:39	C21	CPPclang++20.1.2	Error
Sep 28, 2026 19:24	C21	CPPclang++20.1.2	Success	24,500
Sep 28, 2026 09:19	C21	CPPclang++18.1.3	Success	14,719+437.31 RP
Sep 27, 2026 09:12	Kevin Heavey	RUSTrust-1.95.0	Success	2,530
Sep 26, 2026 18:41	Kevin Heavey	CSHARP9.0.18	Success	2,502+257.09 RP
Sep 26, 2026 18:39	Kevin Heavey	GOgo1.26.2	Success	2,508+246.13 RP
Sep 26, 2026 18:37	Kevin Heavey	ZIG0.15.1	Success	2,500+217.69 RP
Sep 26, 2026 18:36	Kevin Heavey	RUSTrust-1.95.0	Success	2,508+202.98 RP
Sep 25, 2026 21:20	Kevin Heavey	CPPg++14.2.0	Success	2,513+22.10 RP

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