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	1:20.1.2-0ubuntu1~24.04.2	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
Mar 21, 2026 15:48	Dominique Garmier	RUSTrust-1.94.0	Error
Mar 21, 2026 15:13	Dominique Garmier	RUSTrust-1.94.0	Error
Mar 21, 2026 14:08	Dominique Garmier	CPPclang++18.1.3	Success	5,230
Mar 21, 2026 14:04	limanjun99	CPPg++13.3.0	Success	6,853
Mar 21, 2026 13:58	limanjun99	CPPg++13.3.0	Success	4,944+13.01 RP
Mar 21, 2026 13:56	limanjun99	CPPg++13.3.0	Success	5,508
Mar 21, 2026 13:55	limanjun99	CPPg++13.3.0	Success	5,056
Mar 21, 2026 13:49	limanjun99	CPPg++13.3.0	Success	4,976+3.23 RP
Mar 21, 2026 13:47	limanjun99	CPPg++13.3.0	Success	4,984+244.00 RP
Mar 21, 2026 13:44	limanjun99	CPPg++13.3.0	Success	5,674+14.78 RP
Mar 21, 2026 13:39	Dominique Garmier	RUSTrust-1.94.0	Error
Mar 21, 2026 13:39	limanjun99	CPPg++13.3.0	Success	5,722+944.04 RP
Mar 21, 2026 13:28	limanjun99	CPPg++13.3.0	Success	13,098
Mar 21, 2026 12:22	Dominique Garmier	CPPclang++18.1.3	Success	5,236
Mar 21, 2026 12:22	Dominique Garmier	CPPg++13.3.0	Success	5,949
Mar 21, 2026 12:21	Dominique Garmier	CPPg++13.3.0	Error
Mar 21, 2026 11:30	limanjun99	CPPg++13.3.0	Success	24,324
Mar 21, 2026 11:29	limanjun99	CPPg++13.3.0	Success	24,376
Mar 21, 2026 11:19	limanjun99	CPPg++13.3.0	Success	13,195
Mar 21, 2026 11:15	limanjun99	CPPg++13.3.0	Success	13,842
Mar 21, 2026 11:12	Dominique Garmier	RUSTrust-1.94.0	Error
Mar 21, 2026 11:09	limanjun99	CPPg++13.3.0	Success	12,609
Mar 21, 2026 11:07	limanjun99	CPPg++13.3.0	Success	12,444+618.32 RP
Mar 21, 2026 10:47	limanjun99	CPPg++13.3.0	Success	53,972+185.28 RP
Mar 21, 2026 10:42	Dominique Garmier	CSHARP9.0.14	Success	36,202+113.32 RP
Mar 21, 2026 09:45	Dominique Garmier	ZIG0.13.0	Success	310,484
Mar 21, 2026 09:29	Dominique Garmier	ZIG0.13.0	Error
Mar 21, 2026 04:35	Dominique Garmier	CPPg++13.3.0	Success	4,234
Mar 21, 2026 04:32	Dominique Garmier	CPPg++13.3.0	Success	5,580
Mar 21, 2026 04:26	Dominique Garmier	CPPg++13.3.0	Success	4,232+3.90 RP
Mar 21, 2026 04:25	Dominique Garmier	CPPg++13.3.0	Error
Mar 21, 2026 04:20	Dominique Garmier	CPPg++13.3.0	Success	4,239+17.13 RP
Mar 21, 2026 04:20	Dominique Garmier	CPPg++13.3.0	Success	4,270+66.09 RP
Mar 21, 2026 04:19	Dominique Garmier	CPPg++13.3.0	Success	4,394+112.73 RP
Mar 21, 2026 04:17	Dominique Garmier	CPPg++13.3.0	Success	4,623+52.06 RP
Mar 21, 2026 04:06	Dominique Garmier	CPPclang++18.1.3	Success	7,237
Mar 21, 2026 03:18	Dominique Garmier	CPPg++13.3.0	Success	4,853
Mar 21, 2026 03:10	Dominique Garmier	CPPclang++18.1.3	Success	5,237
Mar 21, 2026 03:09	Dominique Garmier	CPPclang++18.1.3	Success	5,446
Mar 21, 2026 03:07	Dominique Garmier	CPPg++13.3.0	Success	5,011
Mar 20, 2026 21:17	Dominique Garmier	GOgo1.26.1	Success	40,613
Mar 20, 2026 08:43	Dominique Garmier	CPPclang++18.1.3	Success	5,249
Mar 20, 2026 01:36	Dominique Garmier	CPPclang++18.1.3	Success	7,266
Mar 19, 2026 23:19	Dominique Garmier	CPPclang++18.1.3	Success	5,375
Mar 19, 2026 17:16	Dominique Garmier	CPPclang++18.1.3	Success	7,043
Mar 19, 2026 17:06	Dominique Garmier	CPPclang++18.1.3	Success	5,451
Mar 19, 2026 17:06	Dominique Garmier	CPPclang++18.1.3	Success	7,231
Mar 19, 2026 17:05	Dominique Garmier	CPPclang++18.1.3	Success	4,737+4.45 RP
Mar 19, 2026 17:04	Dominique Garmier	CPPclang++18.1.3	Success	4,747+7.52 RP
Mar 19, 2026 17:04	Dominique Garmier	CPPg++13.3.0	Success	4,825
Mar 19, 2026 00:13	Dominique Garmier	CPPg++13.3.0	Success	4,811
Mar 18, 2026 22:05	Dominique Garmier	CPPg++13.3.0	Success	5,656
Mar 16, 2026 22:15	Dominique Garmier	CPPg++13.3.0	Success	4,764+23.10 RP
Mar 16, 2026 22:14	Dominique Garmier	CPPg++13.3.0	Success	4,817+71.57 RP
Mar 15, 2026 10:08	Dominique Garmier	CPPg++13.3.0	Success	4,989+588.38 RP
Mar 14, 2026 18:20	Dominique Garmier	CPPg++13.3.0	Success	7,062+38.05 RP
Mar 14, 2026 17:18	Dominique Garmier	CPPg++13.3.0	Success	7,603
Mar 14, 2026 16:54	Dominique Garmier	CPPg++13.3.0	Success	7,257+22.78 RP
Mar 14, 2026 16:50	Dominique Garmier	CPPg++13.3.0	Success	7,379+130.31 RP
Mar 14, 2026 16:49	Dominique Garmier	CPPclang++18.1.3	Success	8,164+657.45 RP
Mar 14, 2026 16:33	Dominique Garmier	CPPg++13.3.0	Error
Mar 13, 2026 11:46	Dominique Garmier	CPPg++13.3.0	Success	17,623+567.44 RP
Mar 11, 2026 14:28	izotoff	CPPg++13.3.0	Success	4,557
Mar 11, 2026 14:27	izotoff	CPPg++13.3.0	Success	4,547
Mar 11, 2026 13:30	izotoff	CPPg++13.3.0	Success	5,358
Mar 11, 2026 13:28	izotoff	CPPg++13.3.0	Success	4,506
Mar 11, 2026 02:23	izotoff	CPPg++13.3.0	Success	8,182
Mar 11, 2026 02:15	izotoff	CPPg++13.3.0	Success	6,176
Mar 11, 2026 02:12	izotoff	CPPg++13.3.0	Error
Mar 11, 2026 02:04	izotoff	CPPg++13.3.0	Success	4,607
Mar 11, 2026 01:58	izotoff	CPPg++13.3.0	Success	24,348
Mar 11, 2026 01:57	izotoff	CPPg++13.3.0	Success	12,263
Mar 11, 2026 01:55	izotoff	CPPg++13.3.0	Success	12,288
Mar 11, 2026 01:53	izotoff	CPPg++13.3.0	Success	12,325
Mar 11, 2026 01:42	izotoff	CPPg++13.3.0	Success	5,713
Mar 11, 2026 01:41	izotoff	CPPg++13.3.0	Success	5,758
Mar 10, 2026 22:19	izotoff	CPPg++13.3.0	Success	4,341
Mar 10, 2026 22:18	izotoff	CPPg++13.3.0	Success	4,332
Mar 10, 2026 22:11	izotoff	CPPg++13.3.0	Success	4,334
Mar 10, 2026 22:06	izotoff	CPPg++13.3.0	Success	4,350
Mar 10, 2026 22:00	izotoff	CPPg++13.3.0	Success	12,704
Mar 10, 2026 21:50	izotoff	CPPg++13.3.0	Error
Mar 10, 2026 21:48	izotoff	CPPg++13.3.0	Error
Mar 10, 2026 21:37	izotoff	CPPg++13.3.0	Success	54,181
Mar 10, 2026 21:33	izotoff	CPPg++13.3.0	Success	4,336
Mar 10, 2026 21:12	izotoff	CPPg++13.3.0	Success	4,333
Mar 10, 2026 21:11	izotoff	CPPclang++18.1.3	Error
Mar 10, 2026 21:10	izotoff	CPPg++13.3.0	Success	4,331+185.79 RP
Mar 10, 2026 21:08	izotoff	CPPg++13.3.0	Success	54,232
Mar 10, 2026 21:06	izotoff	CPPg++13.3.0	Success	53,845
Mar 10, 2026 21:05	izotoff	CPPg++13.3.0	Success	55,613
Mar 10, 2026 21:03	izotoff	CPPg++13.3.0	Error
Mar 10, 2026 07:02	olliecrow	CPPg++13.3.0	Success	3,411
Mar 10, 2026 06:55	olliecrow	CPPg++13.3.0	Success	3,411
Mar 10, 2026 05:52	olliecrow	CPPg++13.3.0	Success	3,412
Mar 10, 2026 05:48	olliecrow	CPPg++13.3.0	Success	3,419
Mar 10, 2026 05:44	olliecrow	CPPg++13.3.0	Success	3,413
Mar 10, 2026 05:41	olliecrow	CPPg++13.3.0	Success	3,413
Mar 10, 2026 05:37	olliecrow	CPPg++13.3.0	Success	3,412
Mar 10, 2026 05:33	olliecrow	CPPg++13.3.0	Success	3,413

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