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
Apr 20, 2026 16:50	Ben	CPPg++13.3.0	Success	4,292+2'329.92 RP
Apr 20, 2026 15:20	olliecrow	RUSTrust-1.94.0	Success	3,410
Apr 20, 2026 15:18	olliecrow	CPPg++13.3.0	Success	3,414
Apr 19, 2026 08:52	olliecrow	CPPclang++18.1.3	Success	3,411
Apr 19, 2026 05:14	Charles Cabergs	CPPg++13.3.0	Success	4,065+146.82 RP
Apr 19, 2026 04:48	olliecrow	CPPclang++18.1.3	Success	3,412
Apr 19, 2026 04:46	olliecrow	CPPclang++18.1.3	Success	3,410
Apr 19, 2026 03:07	Charles Cabergs	CPPg++13.3.0	Success	4,323+14.36 RP
Apr 19, 2026 03:03	olliecrow	CPPclang++18.1.3	Success	3,417
Apr 19, 2026 03:02	olliecrow	CPPclang++18.1.3	Success	3,412
Apr 19, 2026 00:48	Charles Cabergs	CPPg++13.3.0	Success	4,350+61.21 RP
Apr 18, 2026 22:32	Charles Cabergs	CPPg++13.3.0	Success	4,554
Apr 18, 2026 15:58	Charles Cabergs	CPPg++13.3.0	Success	4,469+71.26 RP
Apr 18, 2026 11:16	Charles Cabergs	CPPg++13.3.0	Success	4,616+587.85 RP
Apr 18, 2026 05:37	limanjun99	CPPg++13.3.0	Success	3,125
Apr 18, 2026 05:35	limanjun99	CPPg++13.3.0	Success	3,104+17.55 RP
Apr 18, 2026 05:28	limanjun99	CPPg++13.3.0	Success	3,234
Apr 18, 2026 05:26	limanjun99	CPPg++13.3.0	Success	3,121+19.39 RP
Apr 18, 2026 05:26	limanjun99	CPPg++13.3.0	Success	3,141
Apr 18, 2026 05:22	limanjun99	CPPg++13.3.0	Success	3,147
Apr 18, 2026 05:16	limanjun99	CPPg++13.3.0	Success	3,140+3.04 RP
Apr 18, 2026 05:14	limanjun99	CPPg++13.3.0	Success	3,143+421.53 RP
Apr 18, 2026 05:11	limanjun99	CPPg++13.3.0	Success	3,623+75.58 RP
Apr 18, 2026 05:09	limanjun99	CPPg++13.3.0	Success	3,725+468.25 RP
Apr 18, 2026 04:03	limanjun99	CPPg++13.3.0	Success	4,747
Apr 18, 2026 03:58	limanjun99	CPPg++13.3.0	Success	4,618
Apr 18, 2026 03:56	limanjun99	CPPg++13.3.0	Success	4,552
Apr 18, 2026 03:55	limanjun99	CPPg++13.3.0	Success	4,622
Apr 18, 2026 03:54	limanjun99	CPPg++13.3.0	Success	4,864
Apr 18, 2026 03:45	limanjun99	CPPg++13.3.0	Success	4,512+53.21 RP
Apr 18, 2026 03:40	limanjun99	CPPg++13.3.0	Success	4,623+140.44 RP
Apr 18, 2026 03:16	Charles Cabergs	CPPg++13.3.0	Success	6,335+309.82 RP
Apr 17, 2026 21:38	olliecrow	RUSTrust-1.94.0	Success	3,410
Apr 17, 2026 21:16	olliecrow	GOgo1.26.2	Success	3,415
Apr 17, 2026 19:14	Charles Cabergs	CPPg++13.3.0	Success	7,882+1'268.71 RP
Apr 17, 2026 02:49	Jasper Edbrooke	CSHARP9.0.15	Success	12,230
Apr 17, 2026 02:48	Jasper Edbrooke	CSHARP9.0.15	Success	11,318
Apr 17, 2026 02:47	Jasper Edbrooke	CSHARP9.0.15	Success	11,431
Apr 17, 2026 02:46	Jasper Edbrooke	CSHARP9.0.15	Success	14,948
Apr 17, 2026 02:45	Jasper Edbrooke	CSHARP9.0.15	Success	13,363
Apr 17, 2026 02:44	Jasper Edbrooke	CSHARP9.0.15	Success	12,458
Apr 17, 2026 02:26	Jasper Edbrooke	CSHARP9.0.15	Success	15,637
Apr 17, 2026 02:22	Jasper Edbrooke	CSHARP9.0.15	Success	15,628
Apr 17, 2026 02:15	Jasper Edbrooke	CSHARP9.0.15	Success	15,657
Apr 17, 2026 02:08	Jasper Edbrooke	CSHARP9.0.15	Success	25,040
Apr 17, 2026 02:06	Jasper Edbrooke	CSHARP9.0.15	Success	24,468
Apr 17, 2026 02:02	Jasper Edbrooke	CSHARP9.0.15	Success	21,921
Apr 17, 2026 01:57	Jasper Edbrooke	CSHARP9.0.15	Success	24,551
Apr 17, 2026 01:37	Jasper Edbrooke	CSHARP9.0.15	Success	10,806
Apr 17, 2026 01:30	Jasper Edbrooke	CSHARP9.0.15	Success	11,076
Apr 17, 2026 01:19	Jasper Edbrooke	CSHARP9.0.15	Success	10,235+5.22 RP
Apr 17, 2026 01:18	Jasper Edbrooke	CSHARP9.0.15	Success	10,290+2.17 RP
Apr 17, 2026 01:01	Jasper Edbrooke	CSHARP9.0.15	Success	10,332
Apr 17, 2026 00:59	Jasper Edbrooke	CSHARP9.0.15	Success	10,313+31.92 RP
Apr 17, 2026 00:50	Jasper Edbrooke	CSHARP9.0.15	Success	10,664+5.85 RP
Apr 17, 2026 00:48	Jasper Edbrooke	CSHARP9.0.15	Success	11,202
Apr 17, 2026 00:47	Jasper Edbrooke	CSHARP9.0.15	Success	10,731+41.01 RP
Apr 16, 2026 23:53	olliecrow	CSHARP9.0.14	Success	3,612+1'877.68 RP
Apr 16, 2026 22:40	olliecrow	CPPg++13.3.0	Success	3,426
Apr 16, 2026 22:22	Jasper Edbrooke	CSHARP9.0.15	Success	11,233
Apr 16, 2026 22:18	Jasper Edbrooke	CSHARP9.0.15	Success	16,766
Apr 16, 2026 22:16	Jasper Edbrooke	CSHARP9.0.15	Success	13,330
Apr 16, 2026 22:09	Jasper Edbrooke	CSHARP9.0.15	Success	11,784
Apr 16, 2026 22:07	Jasper Edbrooke	CSHARP9.0.15	Success	11,501
Apr 16, 2026 21:21	Jasper Edbrooke	CSHARP9.0.15	Success	11,225+35.62 RP
Apr 16, 2026 20:44	Jasper Edbrooke	CSHARP9.0.15	Success	11,465
Apr 16, 2026 20:41	Jasper Edbrooke	CSHARP9.0.15	Success	11,454+24.94 RP
Apr 16, 2026 20:38	Jasper Edbrooke	CSHARP9.0.15	Error
Apr 16, 2026 20:34	Jasper Edbrooke	CSHARP9.0.15	Error
Apr 16, 2026 20:33	Jasper Edbrooke	CSHARP9.0.15	Error
Apr 16, 2026 20:31	Jasper Edbrooke	CSHARP9.0.15	Error
Apr 16, 2026 20:11	Jasper Edbrooke	CSHARP9.0.15	Success	11,632
Apr 16, 2026 20:06	Jasper Edbrooke	CSHARP9.0.15	Success	11,620+43.60 RP
Apr 16, 2026 20:05	Jasper Edbrooke	CSHARP9.0.15	Success	11,922+29.98 RP
Apr 16, 2026 20:02	Jasper Edbrooke	CSHARP9.0.15	Success	12,139+667.68 RP
Apr 16, 2026 20:00	Jasper Edbrooke	CSHARP9.0.15	Success	20,410+11.90 RP
Apr 16, 2026 18:31	Jasper Edbrooke	CSHARP9.0.15	Success	20,661+377.66 RP
Apr 16, 2026 17:52	Jasper Edbrooke	CSHARP9.0.15	Success	33,878+287.47 RP
Apr 16, 2026 17:35	Jasper Edbrooke	CSHARP9.0.15	Success	376,527
Apr 16, 2026 17:18	Jasper Edbrooke	CSHARP9.0.15	Success	375,124+26.66 RP
Apr 14, 2026 20:49	olliecrow	RUSTrust-1.94.0	Success	3,547
Apr 14, 2026 00:52	olliecrow	ZIG0.14.0	Success	3,415+565.87 RP
Apr 7, 2026 03:43	olliecrow	GOgo1.26.1	Success	3,438
Apr 1, 2026 17:17	olliecrow	RUSTrust-1.94.1	Error
Mar 31, 2026 18:00	olliecrow	CPPg++13.3.0	Success	3,413
Mar 31, 2026 17:54	olliecrow	CPPg++13.3.0	Success	3,415
Mar 30, 2026 12:32	Dominique Garmier	RUSTrust-1.94.1	Success	4,276
Mar 30, 2026 11:38	Dominique Garmier	RUSTrust-1.94.1	Success	3,639
Mar 30, 2026 08:31	Dominique Garmier	RUSTrust-1.94.1	Success	4,589
Mar 30, 2026 06:53	Dominique Garmier	RUSTrust-1.94.1	Success	4,019
Mar 30, 2026 06:48	Dominique Garmier	RUSTrust-1.94.1	Success	5,263
Mar 30, 2026 05:06	Dominique Garmier	RUSTrust-1.94.1	Success	4,985
Mar 30, 2026 00:58	Dominique Garmier	RUSTrust-1.94.1	Success	3,607
Mar 30, 2026 00:57	Dominique Garmier	RUSTrust-1.94.1	Success	4,844
Mar 29, 2026 21:36	Dominique Garmier	RUSTrust-1.94.1	Success	363,875
Mar 29, 2026 20:33	Dominique Garmier	RUSTrust-1.94.1	Success	360,776
Mar 29, 2026 19:33	Dominique Garmier	RUSTrust-1.94.1	Success	363,830
Mar 29, 2026 19:29	Dominique Garmier	RUSTrust-1.94.1	Success	368,293
Mar 29, 2026 17:51	Dominique Garmier	RUSTrust-1.94.1	Error
Mar 29, 2026 17:46	Dominique Garmier	RUSTrust-1.94.1	Success	283,187

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