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
Jan 6, 2026 16:42	Rajarshi Basu	CPPg++13.3.0	Error
Jan 6, 2026 16:39	Rajarshi Basu	CPPg++13.3.0	Error
Jan 6, 2026 16:37	Rajarshi Basu	CPPg++13.3.0	Success	83,680
Jan 6, 2026 16:35	Rajarshi Basu	CPPg++13.3.0	Error
Jan 6, 2026 16:29	Rajarshi Basu	CPPg++13.3.0	Success	5,005
Jan 6, 2026 10:50	Rajarshi Basu	CPPg++13.3.0	Success	73,292
Jan 6, 2026 10:48	Rajarshi Basu	CPPg++13.3.0	Success	71,736
Jan 6, 2026 10:40	Rajarshi Basu	CPPg++13.3.0	Success	69,645
Jan 6, 2026 10:25	Rajarshi Basu	CPPg++13.3.0	Success	81,901
Jan 6, 2026 10:24	Rajarshi Basu	CPPg++13.3.0	Success	5,635
Jan 6, 2026 10:20	Rajarshi Basu	CPPg++13.3.0	Success	70,267
Jan 6, 2026 10:19	Rajarshi Basu	CPPg++13.3.0	Success	77,752
Jan 6, 2026 10:16	Rajarshi Basu	CPPg++13.3.0	Success	69,763
Jan 6, 2026 09:36	Rajarshi Basu	CPPg++13.3.0	Error
Jan 5, 2026 09:05	Rajarshi Basu	CPPg++13.3.0	Success	79,786
Jan 5, 2026 09:03	Rajarshi Basu	CPPg++13.3.0	Success	73,229
Jan 5, 2026 09:01	Rajarshi Basu	CPPg++13.3.0	Error
Jan 5, 2026 09:00	Rajarshi Basu	CPPg++13.3.0	Error
Jan 5, 2026 09:00	Rajarshi Basu	CPPg++13.3.0	Error
Jan 5, 2026 08:55	Rajarshi Basu	CPPg++13.3.0	Success	5,259
Jan 5, 2026 08:49	Rajarshi Basu	CPPg++13.3.0	Success	75,618
Jan 2, 2026 08:18	Rajarshi Basu	CPPg++13.3.0	Success	86,631
Jan 2, 2026 08:09	Rajarshi Basu	CPPg++13.3.0	Success	5,152
Jan 2, 2026 08:08	Rajarshi Basu	CPPg++13.3.0	Success	6,813
Jan 2, 2026 08:08	Rajarshi Basu	CPPg++13.3.0	Success	5,548
Jan 2, 2026 08:07	Rajarshi Basu	CPPg++13.3.0	Success	89,748
Jan 2, 2026 08:07	Rajarshi Basu	CPPg++13.3.0	Success	106,650
Jan 2, 2026 08:07	Rajarshi Basu	CPPg++13.3.0	Success	81,313
Jan 2, 2026 08:06	Rajarshi Basu	CPPg++13.3.0	Success	85,624
Jan 2, 2026 08:05	Rajarshi Basu	CPPg++13.3.0	Success	88,733
Jan 2, 2026 08:04	Rajarshi Basu	CPPg++13.3.0	Success	86,147
Jan 2, 2026 08:04	Rajarshi Basu	CPPg++13.3.0	Success	101,879
Jan 2, 2026 08:04	Rajarshi Basu	CPPg++13.3.0	Success	96,278
Jan 2, 2026 08:04	Rajarshi Basu	CPPg++13.3.0	Success	88,059
Jan 2, 2026 08:04	Rajarshi Basu	CPPg++13.3.0	Success	5,800
Jan 2, 2026 08:02	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 07:32	Rajarshi Basu	CPPg++13.3.0	Success	5,102
Jan 2, 2026 06:24	Rajarshi Basu	CPPg++13.3.0	Success	4,760+649.25 RP
Jan 2, 2026 06:11	Rajarshi Basu	CPPg++13.3.0	Success	85,995
Jan 2, 2026 06:10	Rajarshi Basu	CPPg++13.3.0	Success	88,280
Jan 2, 2026 06:01	Rajarshi Basu	CPPg++13.3.0	Success	6,889+69.23 RP
Jan 2, 2026 05:53	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 05:52	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 05:48	Rajarshi Basu	CPPg++13.3.0	Success	89,279
Jan 2, 2026 05:46	Rajarshi Basu	CPPg++13.3.0	Success	105,178
Jan 2, 2026 05:45	Rajarshi Basu	CPPg++13.3.0	Success	89,957
Jan 2, 2026 05:43	Rajarshi Basu	CPPg++13.3.0	Success	7,234+136.41 RP
Jan 2, 2026 05:33	Rajarshi Basu	CPPg++13.3.0	Success	99,724
Jan 2, 2026 05:33	Rajarshi Basu	CPPg++13.3.0	Success	101,899
Jan 2, 2026 05:32	Rajarshi Basu	CPPg++13.3.0	Success	11,334
Jan 2, 2026 05:29	Rajarshi Basu	CPPg++13.3.0	Success	11,943
Jan 2, 2026 05:27	Rajarshi Basu	CPPg++13.3.0	Success	100,366
Jan 2, 2026 05:11	Rajarshi Basu	CPPg++13.3.0	Success	11,977
Jan 2, 2026 05:07	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 05:01	Rajarshi Basu	CPPg++13.3.0	Success	97,489
Jan 2, 2026 04:55	Rajarshi Basu	CPPg++13.3.0	Success	8,026+228.24 RP
Jan 2, 2026 04:53	Rajarshi Basu	CPPg++13.3.0	Success	96,683
Jan 2, 2026 04:52	Rajarshi Basu	CPPg++13.3.0	Success	90,531
Jan 2, 2026 04:44	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 04:44	Rajarshi Basu	CPPg++13.3.0	Success	88,780
Jan 2, 2026 04:41	Rajarshi Basu	CPPg++13.3.0	Success	10,581
Jan 2, 2026 04:41	Rajarshi Basu	CPPg++13.3.0	Success	9,826+25.84 RP
Jan 2, 2026 04:40	Rajarshi Basu	CPPg++13.3.0	Success	11,922
Jan 2, 2026 04:40	Rajarshi Basu	CPPg++13.3.0	Success	13,534
Jan 2, 2026 04:39	Rajarshi Basu	CPPg++13.3.0	Success	19,759
Jan 2, 2026 04:35	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 04:33	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 04:30	Rajarshi Basu	CPPg++13.3.0	Success	36,330
Jan 2, 2026 04:30	Josu San Martin	RUSTrust-1.92.0	Success	12,068+13.18 RP
Jan 2, 2026 04:30	Josu San Martin	RUSTrust-1.92.0	Success	14,145
Jan 2, 2026 04:28	Rajarshi Basu	CPPg++13.3.0	Success	34,807
Jan 2, 2026 04:27	Rajarshi Basu	CPPg++13.3.0	Success	38,212
Jan 2, 2026 04:24	Rajarshi Basu	CPPg++13.3.0	Success	85,540
Jan 2, 2026 04:22	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 04:20	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 03:57	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 03:50	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 03:49	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 03:49	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 03:26	Rajarshi Basu	CPPg++13.3.0	Error
Jan 2, 2026 03:24	Rajarshi Basu	CPPg++13.3.0	Error
Jan 1, 2026 04:51	Keefe	CPPclang++18.1.3	Success	10,630
Jan 1, 2026 04:50	Keefe	CPPg++13.3.0	Success	10,468+47.36 RP
Jan 1, 2026 04:44	Keefe	CPPg++13.3.0	Success	11,124
Dec 31, 2025 09:56	Rajarshi Basu	CPPg++13.3.0	Error
Dec 31, 2025 09:46	Rajarshi Basu	CPPg++13.3.0	Success	95,455
Dec 31, 2025 08:52	Rajarshi Basu	CPPg++13.3.0	Success	29,064
Dec 31, 2025 08:30	Rajarshi Basu	CPPg++13.3.0	Success	29,283
Dec 31, 2025 08:27	Rajarshi Basu	CPPg++13.3.0	Error
Dec 31, 2025 08:25	Rajarshi Basu	CPPg++13.3.0	Error
Dec 31, 2025 08:22	Rajarshi Basu	CPPg++13.3.0	Success	10,095
Dec 31, 2025 08:22	Rajarshi Basu	CPPg++13.3.0	Success	12,575
Dec 31, 2025 08:20	Rajarshi Basu	CPPg++13.3.0	Success	10,830
Dec 31, 2025 08:17	Rajarshi Basu	CPPg++13.3.0	Success	10,082+1.08 RP
Dec 31, 2025 08:15	Rajarshi Basu	CPPg++13.3.0	Success	10,658
Dec 31, 2025 08:14	Rajarshi Basu	CPPg++13.3.0	Success	10,093+7.60 RP
Dec 27, 2025 12:14	Rajarshi Basu	CPPg++13.3.0	Success	11,632
Dec 27, 2025 12:14	Rajarshi Basu	CPPg++13.3.0	Success	10,849
Dec 27, 2025 12:12	Rajarshi Basu	CPPg++13.3.0	Success	10,171+545.80 RP
Dec 27, 2025 12:10	Rajarshi Basu	CPPg++13.3.0	Error

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