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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Yuriy Lyfenko

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Run Statistics

#	Date	Score	Wall Time	CPU User	Memory	Error
1	Aug 3, 2022 01:36	0	0	0	0	Error: expected "2246609165 ", got "2133939265 "	stderr
2	Aug 3, 2022 01:29	0	0	0	0	Error: expected "2025260867 ", got "1441943442 "	stderr
3	Aug 3, 2022 01:30	0	0	0	0	Error: expected "2070069292 ", got "1807810684 "	stderr
4	Aug 3, 2022 01:31	0	0	0	0	Error: No answer to stdout. Died or killed?
5	Aug 3, 2022 01:32	0	0	0	0	Error: expected "2055807834 ", got "3755006278 "	stderr
6	Aug 3, 2022 01:32	0	0	0	0	Error: expected "2216305391 ", got "252690565 "	stderr
7	Aug 3, 2022 01:33	0	0	0	0	Error: expected "2228904399 ", got "3837263872 "	stderr
8	Aug 3, 2022 01:33	0	0	0	0	Error: No answer to stdout. Died or killed?
9	Aug 3, 2022 01:35	0	0	0	0	Error: No answer to stdout. Died or killed?
10	Aug 3, 2022 01:35	0	0	0	0	Error: No answer to stdout. Died or killed?
11	Aug 2, 2022 18:57	0	0	0	0	Error: expected "2038283875 ", got "4042847178 "	stderr
12	Aug 3, 2022 01:36	0	0	0	0	Error: expected "2244556958 ", got "2147483648 "	stderr
13	Aug 3, 2022 01:37	0	0	0	0	Error: expected "2051762461 ", got "139283656 "	stderr
14	Aug 3, 2022 01:54	0	0	0	0	Error: expected "1977036948 ", got "3914397164 "	stderr
15	Aug 3, 2022 01:58	0	0	0	0	Error: expected "2241853342 ", got "1445465958 "	stderr
16	Aug 3, 2022 01:59	0	0	0	0	Error: expected "2217711518 ", got "2147483648 "	stderr
17	Aug 3, 2022 01:59	0	0	0	0	Error: expected "2196088724 ", got "2147483648 "	stderr
18	Aug 3, 2022 01:59	0	0	0	0	Error: expected "2227145211 ", got "2148139013 "	stderr
19	Aug 3, 2022 01:59	0	0	0	0	Error: expected "2039999194 ", got "890460091 "	stderr
20	Aug 2, 2022 18:56	0	0	0	0	Error: No answer to stdout. Died or killed?
21	Aug 2, 2022 18:56	0	0	0	0	Error: expected "2076913702 ", got "716912815 "	stderr
22	Aug 2, 2022 18:55	0	0	0	0	Error: expected "2074040933 ", got "3466214317 "	stderr
23	Aug 2, 2022 18:55	0	0	0	0	Error: expected "2025660676 ", got "2785192589 "	stderr
24	Aug 2, 2022 18:54	0	0	0	0	Error: expected "2074129641 ", got "3064806728 "	stderr
25	Aug 2, 2022 18:54	0	0	0	0	Error: expected "2028698483 ", got "2008222648 "	stderr
26	Aug 2, 2022 18:54	0	0	0	0	Error: expected "2058427146 ", got "2146728192 "	stderr
27	Aug 3, 2022 01:30	4,906	103,515,467	40,229,224	2,215,936
28	Aug 2, 2022 18:57	4,920	120,431,323	40,341,560	2,228,224
29	Aug 2, 2022 18:57	4,926	110,790,378	40,395,520	2,224,128
30	Aug 3, 2022 01:31	4,942	105,957,324	40,523,814	2,224,128
31	Aug 3, 2022 01:59	4,945	101,125,978	40,546,050	2,224,128
32	Aug 3, 2022 01:59	4,945	103,094,673	40,552,022	2,224,128
33	Aug 2, 2022 18:57	4,960	112,383,375	40,675,849	2,224,128
34	Aug 3, 2022 01:59	4,961	105,591,886	40,682,248	2,220,032
35	Aug 3, 2022 01:30	5,118	111,611,395	41,963,928	2,224,128
36	Aug 3, 2022 01:31	5,126	103,303,906	42,033,767	2,220,032
37	Aug 3, 2022 01:30	5,141	102,237,944	42,154,502	2,248,704
38	Aug 3, 2022 01:31	5,170	114,634,509	42,391,355	2,232,320

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