Large matrix multiplication

Multiply two square matrices as fast as possible.

Input

Two 2000 x 2000 matrices of uint32 values on STDIN, encoded back-to-back in row-major order, little-endian byte order.

Output

Write the resulting 2000 x 2000 product matrix to STDOUT in the same binary format (row-major, little-endian uint32).

Restrictions:60s256Mb 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
Jun 7, 2026 12:25	Victor Mercklé	CPPg++14.2.0	Success	1,751+39.00 RP
Jun 6, 2026 20:35	Victor Mercklé	CPPg++14.2.0	Success	1,757+424.14 RP
Jun 5, 2026 01:09	Victor Mercklé	CPPg++14.2.0	Success	1,826
Jun 5, 2026 01:04	Victor Mercklé	CPPg++14.2.0	Success	1,855
Jun 5, 2026 00:59	Victor Mercklé	CPPg++14.2.0	Success	1,830
Jun 5, 2026 00:53	Victor Mercklé	CPPg++14.2.0	Success	1,825+6.00 RP
Jun 5, 2026 00:45	Victor Mercklé	CPPg++14.2.0	Success	1,826+11.98 RP
Jun 5, 2026 00:40	Victor Mercklé	CPPg++14.2.0	Success	1,828+5.98 RP
May 31, 2026 00:37	Elijah Kin	CPPg++14.2.0	Success	4,825+7.70 RP
May 30, 2026 04:07	Elijah Kin	CPPg++14.2.0	Success	4,843+60.83 RP
May 30, 2026 04:02	Elijah Kin	CPPg++14.2.0	Success	6,907
May 30, 2026 03:58	Elijah Kin	CPPg++14.2.0	Success	5,225
May 30, 2026 03:54	Elijah Kin	CPPclang++20.1.2	Success	7,728
May 30, 2026 03:51	Elijah Kin	CPPg++14.2.0	Success	4,990+569.91 RP
May 30, 2026 03:47	Elijah Kin	CPPg++14.2.0	Success	6,973+334.60 RP
May 30, 2026 03:41	Elijah Kin	CPPg++14.2.0	Success	9,144
May 30, 2026 03:39	Elijah Kin	CPPg++14.2.0	Success	9,095+301.99 RP
May 30, 2026 03:38	Elijah Kin	CPPg++14.2.0	Error
May 30, 2026 03:28	Elijah Kin	CPPg++14.2.0	Success	12,909
May 30, 2026 03:24	Elijah Kin	CPPg++14.2.0	Success	12,539+616.03 RP
May 30, 2026 03:20	Elijah Kin	CPPg++14.2.0	Success	55,104
May 30, 2026 03:18	Elijah Kin	CPPg++10.5.0	Success	55,102+181.48 RP
May 22, 2026 23:20	M-Rochat	CPPg++13.3.0	Success	4,060+4.24 RP
May 22, 2026 23:18	M-Rochat	CPPg++14.2.0	Success	4,069
May 22, 2026 23:17	M-Rochat	CPPg++13.3.0	Success	4,068
May 22, 2026 23:15	M-Rochat	CPPg++13.3.0	Success	4,067+35.16 RP
May 22, 2026 23:13	M-Rochat	CPPg++13.3.0	Success	4,140
May 22, 2026 23:12	M-Rochat	CPPg++13.3.0	Success	4,137
May 22, 2026 23:06	M-Rochat	CPPg++13.3.0	Success	4,575
May 22, 2026 23:02	M-Rochat	CPPg++13.3.0	Success	4,230
May 22, 2026 22:59	M-Rochat	CPPclang++17.0.6	Success	6,771
May 22, 2026 22:56	M-Rochat	CPPg++13.3.0	Success	4,189
May 22, 2026 22:52	M-Rochat	CPPg++13.3.0	Success	4,758
May 22, 2026 22:49	M-Rochat	CPPg++13.3.0	Success	4,651
May 22, 2026 17:56	M-Rochat	CPPg++13.3.0	Success	4,134
May 22, 2026 17:54	M-Rochat	CPPg++13.3.0	Success	4,134
May 22, 2026 17:52	M-Rochat	CPPg++13.3.0	Success	4,334
May 22, 2026 17:47	M-Rochat	CPPg++13.3.0	Success	4,230
May 22, 2026 17:43	M-Rochat	CPPg++13.3.0	Success	4,129
May 22, 2026 17:42	M-Rochat	CPPg++14.2.0	Success	4,190
May 22, 2026 17:39	M-Rochat	CPPg++13.3.0	Success	4,165
May 22, 2026 17:38	M-Rochat	CPPg++13.3.0	Success	4,130
May 21, 2026 00:34	Fernando Antunez	CPPg++10.5.0	Error
May 20, 2026 17:16	M-Rochat	CPPg++13.3.0	Success	4,185
May 20, 2026 17:14	M-Rochat	CPPg++13.3.0	Success	4,131
May 20, 2026 17:12	M-Rochat	CPPg++13.3.0	Success	4,156
May 20, 2026 17:11	M-Rochat	CPPg++13.3.0	Success	4,127
May 20, 2026 17:09	M-Rochat	CPPg++13.3.0	Success	4,257
May 20, 2026 17:08	M-Rochat	CPPg++13.3.0	Success	4,325
May 20, 2026 17:07	M-Rochat	CPPg++13.3.0	Success	4,235
May 20, 2026 17:04	M-Rochat	CPPg++13.3.0	Success	4,156
May 20, 2026 17:00	M-Rochat	CPPg++13.3.0	Success	4,126+4.10 RP
May 20, 2026 16:59	M-Rochat	CPPg++13.3.0	Success	6,985
May 20, 2026 16:58	M-Rochat	CPPg++13.3.0	Success	11,647
May 18, 2026 17:05	M-Rochat	CPPg++13.3.0	Success	4,192
May 18, 2026 04:35	M-Rochat	CPPg++13.3.0	Success	6,711
May 17, 2026 23:10	M-Rochat	CPPg++13.3.0	Success	20,924
May 17, 2026 23:09	M-Rochat	CPPg++13.3.0	Success	23,319
May 17, 2026 10:48	Aleksei Shahoika	CPPclang++18.1.3	Success	1,987
May 17, 2026 09:54	M-Rochat	CPPclang++18.1.3	Success	23,015
May 17, 2026 09:54	M-Rochat	CPPg++13.3.0	Success	19,483
May 17, 2026 09:52	M-Rochat	CPPg++13.3.0	Error
May 17, 2026 08:59	M-Rochat	CPPg++13.3.0	Success	7,037
May 17, 2026 08:22	M-Rochat	CPPg++13.3.0	Success	4,136
May 17, 2026 04:49	M-Rochat	CPPg++13.3.0	Success	4,495
May 17, 2026 04:12	M-Rochat	CPPg++13.3.0	Success	6,713
May 17, 2026 04:11	M-Rochat	CPPg++13.3.0	Success	4,133+25.49 RP
May 17, 2026 04:09	M-Rochat	CPPg++13.3.0	Success	4,177+47.75 RP
May 17, 2026 02:57	M-Rochat	CPPg++13.3.0	Success	4,262+1.65 RP
May 17, 2026 02:55	M-Rochat	CPPg++13.3.0	Success	4,265+4.94 RP
May 17, 2026 02:53	M-Rochat	CPPg++13.3.0	Success	4,274+1.09 RP
May 17, 2026 02:53	M-Rochat	CPPg++13.3.0	Success	4,279
May 17, 2026 00:30	Aleksei Shahoika	CPPg++10.5.0	Error
May 17, 2026 00:25	Aleksei Shahoika	CPPclang++18.1.3	Success	1,988
May 17, 2026 00:02	Aleksei Shahoika	CPPclang++18.1.3	Success	1,984
May 16, 2026 23:57	Aleksei Shahoika	CPPclang++18.1.3	Success	1,987
May 16, 2026 23:23	Aleksei Shahoika	CPPclang++18.1.3	Success	1,982+292.56 RP
May 16, 2026 17:56	M-Rochat	CPPg++13.3.0	Success	4,276+33.42 RP
May 16, 2026 16:45	M-Rochat	CPPg++14.2.0	Success	4,338+14.26 RP
May 16, 2026 16:44	M-Rochat	CPPg++14.2.0	Success	4,365+47.79 RP
May 16, 2026 16:16	M-Rochat	CPPclang++20.1.2	Success	7,018
May 16, 2026 16:16	M-Rochat	CPPg++14.2.0	Success	4,497
May 16, 2026 16:09	M-Rochat	CPPg++14.2.0	Success	4,458+130.78 RP
May 16, 2026 15:57	M-Rochat	CPPg++14.2.0	Success	4,734+1'280.43 RP
May 16, 2026 07:25	M-Rochat	CPPg++14.2.0	Success	12,266
May 15, 2026 19:33	M-Rochat	CPPg++14.2.0	Success	12,020+831.95 RP
May 14, 2026 16:53	Josu San Martin	CSHARP9.0.13	Success	36,143
May 14, 2026 16:51	Josu San Martin	ZIG0.15.1	Success	13,611
May 14, 2026 10:16	Aleksei Shahoika	CPPclang++18.1.3	Success	2,104+9.02 RP
May 14, 2026 10:10	Aleksei Shahoika	CPPclang++18.1.3	Success	2,108+49.00 RP
May 14, 2026 10:00	Aleksei Shahoika	CPPclang++18.1.3	Success	2,131
May 14, 2026 09:56	Aleksei Shahoika	CPPclang++18.1.3	Success	2,130+58.77 RP
May 14, 2026 00:41	Aleksei Shahoika	CPPg++10.5.0	Success	2,269
May 14, 2026 00:27	Aleksei Shahoika	CPPclang++18.1.3	Success	2,453
May 14, 2026 00:12	Aleksei Shahoika	CPPclang++18.1.3	Success	2,370
May 14, 2026 00:03	Aleksei Shahoika	CPPclang++18.1.3	Success	2,157+1'461.47 RP
May 13, 2026 23:29	Aleksei Shahoika	CPPclang++18.1.3	Success	3,150
May 13, 2026 23:17	Aleksei Shahoika	CPPclang++18.1.3	Success	3,277
May 13, 2026 23:06	Aleksei Shahoika	CPPclang++18.1.3	Success	3,150+8.04 RP
May 13, 2026 22:56	Aleksei Shahoika	CPPclang++18.1.3	Success	3,158+24.87 RP

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