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.

Date	Author	Language	Status	Score
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
Dec 27, 2025 12:10	Rajarshi Basu	CPPg++13.3.0	Error
Dec 27, 2025 12:10	Rajarshi Basu	CPPg++13.3.0	Error
Dec 27, 2025 12:10	Rajarshi Basu	CPPg++13.3.0	Error
Dec 27, 2025 12:08	Rajarshi Basu	CPPg++13.3.0	Success	23,118
Dec 27, 2025 12:05	Rajarshi Basu	CPPg++13.3.0	Success	22,863+0.29 RP
Dec 27, 2025 12:04	Rajarshi Basu	CPPg++13.3.0	Success	22,878+437.10 RP
Dec 26, 2025 04:11	Josu San Martin	RUSTrust-1.92.0	Success	13,039
Dec 26, 2025 04:10	Josu San Martin	RUSTrust-1.92.0	Success	41,120
Dec 26, 2025 04:07	Josu San Martin	CPPclang++18.1.3	Success	17,422
Dec 26, 2025 04:04	Josu San Martin	CPPclang++18.1.3	Error
Dec 26, 2025 03:55	Josu San Martin	RUSTrust-1.92.0	Success	12,263+7.51 RP
Dec 26, 2025 03:43	Josu San Martin	RUSTrust-1.92.0	Success	12,377+102.98 RP
Dec 26, 2025 03:34	Josu San Martin	RUSTrust-1.92.0	Success	14,185+12.55 RP
Dec 26, 2025 03:34	Josu San Martin	RUSTrust-1.92.0	Success	18,687
Dec 26, 2025 03:31	Josu San Martin	RUSTrust-1.92.0	Success	14,442+90.67 RP
Dec 26, 2025 03:27	Josu San Martin	CPPclang++18.1.3	Success	16,675
Dec 26, 2025 03:27	Josu San Martin	CPPg++13.3.0	Success	19,144
Dec 26, 2025 03:27	Josu San Martin	CPPg++13.3.0	Success	18,573
Dec 26, 2025 03:27	Josu San Martin	RUSTrust-1.92.0	Success	29,127
Dec 26, 2025 03:18	Josu San Martin	RUSTrust-1.92.0	Success	29,199
Dec 26, 2025 03:17	Josu San Martin	RUSTrust-1.92.0	Success	19,619
Dec 26, 2025 03:10	Josu San Martin	RUSTrust-1.92.0	Success	16,618+0.04 RP
Dec 26, 2025 03:10	Josu San Martin	RUSTrust-1.92.0	Error
Dec 26, 2025 03:09	Josu San Martin	RUSTrust-1.92.0	Error
Dec 26, 2025 03:05	Josu San Martin	RUSTrust-1.92.0	Success	16,619+264.73 RP
Dec 26, 2025 01:25	Josu San Martin	RUSTrust-1.92.0	Success	29,674+337.00 RP
Nov 19, 2025 17:57	Yuriy Lyfenko	CPPg++13.3.0	Success	3,889+141.81 RP
Nov 18, 2025 17:14	izotoff	GOgo1.25.4	Success	133,659
Nov 14, 2025 11:27	izotoff	GOgo1.25.4	Success	133,428
Nov 12, 2025 21:46	izotoff	GOgo1.25.4	Success	135,437
Nov 12, 2025 21:24	izotoff	GOgo1.18.6	Success	136,586
Nov 12, 2025 21:04	izotoff	GOgo1.25.4	Success	101,029+20.08 RP
Nov 10, 2025 02:20	izotoff	GOgo1.25.4	Success	132,760
Nov 10, 2025 02:17	izotoff	GOgo1.25.4	Success	126,739+78.90 RP
Nov 10, 2025 02:11	izotoff	GOgo1.25.4	Error
Nov 10, 2025 01:40	izotoff	GOgo1.25.4	Error
Nov 9, 2025 15:38	Yehor Bondar	CPPg++13.3.0	Success	93,306+96.91 RP
Nov 9, 2025 15:36	Yehor Bondar	CPPg++13.3.0	Success	974,239+10.26 RP
Nov 7, 2025 09:38	Anton	CSHARP9.0.10	Success	101,324
Nov 7, 2025 09:37	Anton	CSHARP9.0.10	Success	22,920
Nov 4, 2025 23:47	Anton	CSHARP9.0.10	Success	22,902+5.26 RP
Nov 4, 2025 23:38	Anton	CSHARP9.0.10	Success	23,041+233.14 RP
Nov 4, 2025 23:16	Anton	CSHARP9.0.1	Success	32,052
Nov 4, 2025 23:15	Anton	CSHARP9.0.10	Success	31,792
Nov 4, 2025 23:02	Anton	CSHARP8.0.21	Success	33,213
Nov 4, 2025 22:12	Anton	CSHARP9.0.10	Success	31,502+5.34 RP
Nov 4, 2025 22:07	Anton	CSHARP9.0.10	Success	31,769+248.34 RP
Nov 4, 2025 22:03	Anton	CSHARP9.0.10	Error
Nov 4, 2025 21:31	Anton	CSHARP9.0.10	Success	62,044
Nov 4, 2025 21:27	Anton	CSHARP9.0.10	Success	52,513
Nov 4, 2025 21:25	Anton	CSHARP9.0.10	Success	52,464+112.28 RP
Nov 3, 2025 10:51	Anton	CSHARP9.0.10	Error
Nov 1, 2025 20:20	Anton	CSHARP9.0.10	Error
Nov 1, 2025 20:03	Anton	CSHARP9.0.10	Error
Nov 1, 2025 20:00	Anton	CSHARP9.0.10	Error
Nov 1, 2025 19:57	Anton	CSHARP9.0.10	Error
Nov 1, 2025 09:40	Anton	CSHARP9.0.10	Success	74,365+5.82 RP

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