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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Bernard Teo

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Run Statistics

#	Date	Score	Wall Time	CPU User	Memory	Error
1	Nov 20, 2022 16:31	0	0	0	0	Error: expected "2208879584 ", got "2"
2	Nov 20, 2022 07:32	0	0	0	0	Error: expected "2346819295 ", got "1"
3	Nov 20, 2022 07:31	0	0	0	0	Error: expected "2175753316 ", got "2"
4	Nov 20, 2022 07:31	0	0	0	0	Error: expected "1997265215 ", got "1"
5	Nov 20, 2022 07:28	0	0	0	0	Error: expected "2135703902 ", got "2"
6	Nov 20, 2022 07:28	0	0	0	0	Error: expected "2174527411 ", got "2"
7	Nov 20, 2022 07:10	0	0	0	0	Error: expected "2136830179 ", got "2"
8	Nov 20, 2022 07:08	0	0	0	0	Error: expected "2232905373 ", got "2"
9	Nov 20, 2022 07:08	0	0	0	0	Error: expected "1990345441 ", got "1"
10	Nov 20, 2022 07:08	10,410	143,730,171	85,365,304	2,252,800
11	Nov 20, 2022 07:28	10,578	138,190,532	86,741,230	2,199,552
12	Nov 20, 2022 07:08	10,612	144,753,798	87,017,725	2,240,512
13	Nov 20, 2022 07:10	10,628	153,199,330	87,148,451	2,301,952
14	Nov 20, 2022 07:28	10,653	157,623,449	87,356,603	2,269,184
15	Nov 20, 2022 07:32	10,690	158,372,083	87,656,112	2,183,168
16	Nov 20, 2022 16:31	10,765	153,876,491	88,274,271	2,207,744
17	Nov 20, 2022 07:08	10,843	158,068,859	88,915,110	2,260,992
18	Nov 20, 2022 07:08	10,875	162,958,599	89,174,491	2,199,552
19	Nov 20, 2022 07:31	10,938	151,306,079	89,693,256	2,285,568
20	Nov 20, 2022 07:10	10,955	144,585,307	89,829,928	2,195,456
21	Nov 20, 2022 07:32	10,990	152,819,530	90,117,723	2,252,800
22	Nov 20, 2022 07:10	11,019	164,229,744	90,356,527	2,277,376
23	Nov 20, 2022 07:08	11,108	156,796,590	91,084,452	2,207,744
24	Nov 20, 2022 07:32	11,120	155,363,192	91,187,105	2,240,512
25	Nov 20, 2022 07:10	11,120	179,382,737	91,181,123	2,211,840
26	Nov 20, 2022 07:08	11,121	164,361,861	91,190,624	2,232,320
27	Nov 20, 2022 07:08	11,143	155,536,995	91,371,834	2,265,088
28	Nov 20, 2022 16:31	11,170	157,631,765	91,593,796	2,179,072
29	Nov 20, 2022 07:08	11,171	157,016,908	91,601,720	2,187,264
30	Nov 20, 2022 07:10	11,211	166,930,034	91,931,876	2,297,856
31	Nov 20, 2022 07:28	11,262	176,257,624	92,351,984	2,183,168
32	Nov 20, 2022 07:28	11,308	153,283,565	92,721,795	2,203,648
33	Nov 20, 2022 07:31	11,344	157,691,900	93,024,785	2,240,512
34	Nov 20, 2022 07:28	11,344	151,074,234	93,024,311	2,191,360
35	Nov 20, 2022 07:28	11,345	157,030,231	93,029,926	2,252,800
36	Nov 20, 2022 16:31	11,400	149,364,790	93,476,292	2,203,648
37	Nov 20, 2022 07:10	11,405	157,888,328	93,518,765	2,277,376
38	Nov 20, 2022 07:31	11,453	149,511,411	93,911,322	2,281,472
39	Nov 20, 2022 07:08	11,571	169,284,932	94,880,419	2,191,360

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