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
Feb 7, 2026 04:17	Josu San Martin	RUSTrust-1.92.0	Success	11,259
Feb 7, 2026 04:13	Josu San Martin	RUSTrust-1.92.0	Success	11,185
Feb 7, 2026 04:03	Josu San Martin	RUSTrust-1.92.0	Success	3,469
Feb 7, 2026 03:56	Josu San Martin	RUSTrust-1.92.0	Success	3,494
Feb 7, 2026 03:55	Josu San Martin	RUSTrust-1.92.0	Success	3,464+30.51 RP
Feb 7, 2026 03:55	Josu San Martin	RUSTrust-1.92.0	Success	11,435
Feb 7, 2026 03:53	Josu San Martin	CPPclang++18.1.3	Success	4,334
Feb 7, 2026 03:53	Josu San Martin	RUSTrust-1.92.0	Success	3,501+399.93 RP
Feb 7, 2026 03:47	Josu San Martin	CPPclang++18.1.3	Success	12,062
Feb 7, 2026 03:44	Josu San Martin	RUSTrust-1.92.0	Success	4,071+1'096.22 RP
Feb 7, 2026 03:18	Josu San Martin	CPPclang++18.1.3	Success	9,610
Feb 7, 2026 03:17	Josu San Martin	RUSTrust-1.92.0	Success	25,182
Feb 7, 2026 03:17	Josu San Martin	CPPclang++18.1.3	Success	8,467
Feb 7, 2026 03:17	Josu San Martin	CPPg++13.3.0	Success	9,082
Feb 7, 2026 03:02	Josu San Martin	RUSTrust-1.92.0	Success	11,254
Feb 7, 2026 02:46	Josu San Martin	RUSTrust-1.92.0	Success	7,352+11.56 RP
Feb 7, 2026 02:43	Josu San Martin	RUSTrust-1.92.0	Success	15,923
Feb 7, 2026 02:26	Josu San Martin	RUSTrust-1.92.0	Success	24,760
Feb 7, 2026 01:57	Josu San Martin	RUSTrust-1.92.0	Success	8,115
Feb 7, 2026 01:22	Josu San Martin	RUSTrust-1.92.0	Success	7,415+105.61 RP
Jan 29, 2026 20:44	lipapipa	CPPg++13.3.0	Success	26,550
Jan 29, 2026 20:43	lipapipa	CPPg++13.3.0	Success	30,621
Jan 29, 2026 18:47	lipapipa	CPPg++13.3.0	Success	14,487+690.27 RP
Jan 23, 2026 03:31	Josu San Martin	RUSTrust-1.92.0	Success	8,141
Jan 18, 2026 16:15	Josu San Martin	RUSTrust-1.92.0	Success	8,083
Jan 18, 2026 07:14	Josu San Martin	RUSTrust-1.92.0	Success	8,405
Jan 18, 2026 07:11	Josu San Martin	RUSTrust-1.92.0	Success	8,938
Jan 18, 2026 07:07	Josu San Martin	RUSTrust-1.92.0	Success	8,104
Jan 18, 2026 07:05	Josu San Martin	RUSTrust-1.92.0	Success	8,660
Jan 18, 2026 07:05	Josu San Martin	RUSTrust-1.92.0	Success	8,045+11.48 RP
Jan 18, 2026 07:03	Josu San Martin	RUSTrust-1.92.0	Success	9,752
Jan 18, 2026 06:56	Josu San Martin	RUSTrust-1.92.0	Success	11,972
Jan 18, 2026 06:56	Josu San Martin	RUSTrust-1.92.0	Success	24,339
Jan 18, 2026 06:54	Josu San Martin	RUSTrust-1.92.0	Success	8,851
Jan 18, 2026 06:50	Josu San Martin	RUSTrust-1.92.0	Success	22,793
Jan 18, 2026 06:49	Josu San Martin	CPPg++13.3.0	Success	13,064
Jan 18, 2026 06:49	Josu San Martin	CPPg++13.3.0	Success	11,840
Jan 18, 2026 06:40	Josu San Martin	RUSTrust-1.92.0	Success	20,080
Jan 18, 2026 06:40	Josu San Martin	RUSTrust-1.92.0	Success	20,402
Jan 18, 2026 06:37	Josu San Martin	RUSTrust-1.92.0	Success	14,824
Jan 18, 2026 06:37	Josu San Martin	RUSTrust-1.92.0	Success	23,421
Jan 18, 2026 06:29	Josu San Martin	RUSTrust-1.92.0	Success	9,909
Jan 18, 2026 06:22	Josu San Martin	RUSTrust-1.92.0	Success	8,120+8.29 RP
Jan 18, 2026 06:17	Josu San Martin	RUSTrust-1.92.0	Success	8,175+0.15 RP
Jan 18, 2026 06:17	Josu San Martin	RUSTrust-1.92.0	Success	10,013
Jan 18, 2026 06:16	Josu San Martin	RUSTrust-1.92.0	Success	10,165
Jan 18, 2026 06:10	Josu San Martin	RUSTrust-1.92.0	Success	8,176+82.32 RP
Jan 18, 2026 05:58	Josu San Martin	RUSTrust-1.92.0	Success	26,583
Jan 18, 2026 05:49	Josu San Martin	RUSTrust-1.92.0	Success	8,766+2.47 RP
Jan 18, 2026 05:34	Josu San Martin	CPPg++13.3.0	Success	10,178
Jan 18, 2026 05:19	Josu San Martin	RUSTrust-1.92.0	Success	8,936
Jan 18, 2026 05:17	Josu San Martin	CPPg++13.3.0	Success	11,625
Jan 18, 2026 05:16	Josu San Martin	CPPclang++18.1.3	Success	10,758
Jan 18, 2026 05:11	Josu San Martin	RUSTrust-1.92.0	Success	8,830
Jan 18, 2026 05:11	Josu San Martin	RUSTrust-1.92.0	Success	8,788
Jan 18, 2026 05:08	Josu San Martin	RUSTrust-1.92.0	Success	8,785+14.71 RP
Jan 18, 2026 05:08	Josu San Martin	CPPclang++18.1.3	Success	11,316
Jan 18, 2026 04:49	Josu San Martin	CPPclang++18.1.3	Success	17,283
Jan 18, 2026 04:43	Josu San Martin	CPPg++13.3.0	Success	9,645
Jan 18, 2026 04:30	Josu San Martin	RUSTrust-1.92.0	Success	11,953
Jan 18, 2026 04:25	Josu San Martin	RUSTrust-1.92.0	Success	8,995
Jan 18, 2026 04:25	Josu San Martin	CPPclang++18.1.3	Success	9,146
Jan 18, 2026 04:20	Josu San Martin	CPPclang++18.1.3	Success	8,900+75.16 RP
Jan 18, 2026 04:19	Josu San Martin	CPPg++13.3.0	Success	9,538+19.63 RP
Jan 18, 2026 04:18	Josu San Martin	CPPg++13.3.0	Success	9,720+200.17 RP
Jan 18, 2026 04:14	Josu San Martin	RUSTrust-1.92.0	Success	12,834
Jan 18, 2026 03:56	Josu San Martin	RUSTrust-1.92.0	Success	12,077
Jan 8, 2026 08:32	Rajarshi Basu	CPPg++13.3.0	Success	793,591
Jan 8, 2026 08:30	Rajarshi Basu	CPPg++13.3.0	Success	77,174
Jan 8, 2026 08:24	Rajarshi Basu	CPPg++13.3.0	Success	73,867
Jan 8, 2026 08:24	Rajarshi Basu	CPPg++13.3.0	Success	73,406
Jan 8, 2026 08:23	Rajarshi Basu	CPPg++13.3.0	Success	75,525
Jan 8, 2026 08:18	Rajarshi Basu	CPPg++13.3.0	Success	74,681
Jan 8, 2026 08:17	Rajarshi Basu	CPPg++13.3.0	Success	72,803
Jan 8, 2026 08:07	Rajarshi Basu	CPPg++13.3.0	Success	74,008
Jan 8, 2026 08:00	Rajarshi Basu	CPPg++13.3.0	Success	77,422
Jan 8, 2026 07:59	Rajarshi Basu	CPPg++13.3.0	Error
Jan 8, 2026 07:43	Rajarshi Basu	CPPg++13.3.0	Success	77,044
Jan 8, 2026 07:39	Rajarshi Basu	CPPg++13.3.0	Error
Jan 8, 2026 07:37	Rajarshi Basu	CPPg++13.3.0	Success	82,904
Jan 8, 2026 07:32	Rajarshi Basu	CPPg++13.3.0	Success	78,605
Jan 8, 2026 07:09	Rajarshi Basu	CPPg++13.3.0	Success	72,512
Jan 8, 2026 07:05	Rajarshi Basu	CPPg++13.3.0	Success	81,725
Jan 8, 2026 07:04	Rajarshi Basu	CPPg++13.3.0	Success	73,734
Jan 8, 2026 07:01	Rajarshi Basu	CPPg++13.3.0	Success	78,840
Jan 8, 2026 06:58	Rajarshi Basu	CPPg++13.3.0	Success	74,124
Jan 8, 2026 06:58	Rajarshi Basu	CPPg++13.3.0	Success	74,216
Jan 8, 2026 06:42	Rajarshi Basu	CPPg++13.3.0	Success	71,396
Jan 8, 2026 06:40	Rajarshi Basu	CPPg++13.3.0	Success	79,563
Jan 8, 2026 06:36	Rajarshi Basu	CPPg++13.3.0	Success	70,290
Jan 7, 2026 10:21	Rajarshi Basu	CPPg++13.3.0	Success	73,023
Jan 7, 2026 10:21	Rajarshi Basu	CPPg++13.3.0	Success	75,169
Jan 7, 2026 10:21	Rajarshi Basu	CPPg++13.3.0	Success	4,733+11.98 RP
Jan 7, 2026 07:42	Rajarshi Basu	CPPg++13.3.0	Success	70,687
Jan 7, 2026 07:40	Rajarshi Basu	CPPg++13.3.0	Success	73,361
Jan 7, 2026 07:34	Rajarshi Basu	CPPg++13.3.0	Success	75,166
Jan 7, 2026 07:32	Rajarshi Basu	CPPg++13.3.0	Success	70,530
Jan 7, 2026 06:03	Rajarshi Basu	CPPg++13.3.0	Success	78,507
Jan 7, 2026 05:29	Rajarshi Basu	CPPg++13.3.0	Success	70,970
Jan 7, 2026 04:55	Rajarshi Basu	CPPg++13.3.0	Error

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