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	1:20.1.2-0ubuntu1~24.04.2	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.
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	3.0.13-0ubuntu3.9	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.

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Jun 6, 2024 00:25	0	0	0	0	0	Error: expected "2241836340 ", got "3764451308"	stderr
2	Jun 6, 2024 00:20	0	0	0	0	0	Error: expected "2203026232 ", got "2765655025"	stderr
3	Jun 6, 2024 00:20	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
4	Jun 6, 2024 00:20	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
5	Jun 6, 2024 00:20	0	0	0	0	0	Error: expected "2188884554 ", got "0"	stderr
6	Jun 6, 2024 00:20	0	0	0	0	0	Error: expected "2206250265 ", got "2401943572"	stderr
7	Jun 6, 2024 00:20	0	0	0	0	0	Error: No answer to stdout. Died or killed?
8	Jun 6, 2024 00:20	0	0	0	0	0	Error: No answer to stdout. Died or killed?
9	Jun 6, 2024 00:20	0	0	0	0	0	Error: expected "2187120146 ", got "0"	stderr
10	Jun 6, 2024 00:25	0	0	0	0	0	Error: expected "2205166842 ", got "3641001923"	stderr
11	Jun 6, 2024 00:25	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
12	Jun 6, 2024 00:19	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
13	Jun 6, 2024 00:25	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
14	Jun 6, 2024 00:25	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
15	Jun 6, 2024 00:26	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
16	Jun 6, 2024 00:26	0	0	0	0	0	Error: expected "2208916399 ", got "0"	stderr
17	Jun 6, 2024 00:26	0	0	0	0	0	Error: expected "2214647119 ", got "4087366807"	stderr
18	Jun 6, 2024 00:26	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
19	Jun 6, 2024 00:26	0	0	0	0	0	Error: expected "2194927470 ", got "0"	stderr
20	Jun 8, 2024 13:39	0	0	0	0	0	Error: expected "2209300031 ", got "2716909163"	stderr
21	Jun 8, 2024 13:40	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
22	Jun 6, 2024 00:19	0	0	0	0	0	Error: expected "2322899215 ", got "3642934352"	stderr
23	Jun 6, 2024 00:19	0	0	0	0	0	Error: No answer to stdout. Died or killed?
24	Jun 6, 2024 00:19	0	0	0	0	0	Error: expected "2215282801 ", got "3042519943"	stderr
25	Jun 6, 2024 00:19	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
26	Jun 6, 2024 00:19	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
27	Jun 6, 2024 00:19	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
28	Jun 6, 2024 00:19	0	0	0	0	0	Error: expected "2228713837 ", got "480180490"	stderr
29	Jun 6, 2024 00:19	0	0	0	0	0	Error: No answer to stdout. Died or killed?
30	May 30, 2024 19:45	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
31	Jun 6, 2024 00:20	4,903	100,251,593	40,208,488	0	2,240,512
32	Jun 6, 2024 00:20	5,020	98,942,563	41,163,559	0	2,244,608
33	Jun 6, 2024 00:20	5,380	104,789,430	44,118,311	0	2,236,416
34	Nov 20, 2024 16:14	6,266	75,206,507	44,330,000	7,052,000	2,510,848
35	Nov 20, 2024 16:14	7,002	82,758,254	50,368,000	7,051,000	2,510,848
36	Nov 20, 2024 16:14	7,247	81,275,523	51,365,000	8,057,000	2,367,488
37	Nov 20, 2024 16:14	7,668	85,949,590	54,894,000	7,984,000	2,527,232
38	Nov 20, 2024 16:14	7,984	93,999,750	57,413,000	8,058,000	2,289,664
39	Nov 20, 2024 16:14	8,003	90,710,598	58,557,000	7,067,000	2,514,944
40	Nov 20, 2024 16:14	8,124	97,190,724	59,552,000	7,065,000	2,289,664
41	Nov 20, 2024 16:14	8,337	91,099,630	61,325,000	7,037,000	2,510,848
42	Nov 20, 2024 16:14	9,500	105,823,233	69,912,000	7,990,000	2,510,848

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