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 25, 2026 20:32	Dominique Garmier	ZIG0.13.0	Success	4,236
Mar 25, 2026 20:01	Dominique Garmier	ZIG0.13.0	Success	4,233+853.41 RP
Mar 25, 2026 17:07	Dominique Garmier	ZIG0.13.0	Success	6,627+1'070.88 RP
Mar 25, 2026 13:37	Dominique Garmier	ZIG0.13.0	Success	22,826+398.48 RP
Mar 24, 2026 19:02	Dominique Garmier	RUSTrust-1.94.0	Success	16,103
Mar 24, 2026 19:01	Dominique Garmier	RUSTrust-1.94.0	Success	4,842
Mar 24, 2026 03:08	Dominique Garmier	CSHARP9.0.14	Success	57,512
Mar 24, 2026 00:45	Dominique Garmier	GOgo1.26.1	Success	71,703
Mar 23, 2026 16:45	Dominique Garmier	CPPg++13.3.0	Success	4,569
Mar 23, 2026 16:44	Dominique Garmier	CPPg++13.3.0	Success	5,055
Mar 23, 2026 15:47	Dominique Garmier	CPPclang++18.1.3	Success	4,840
Mar 23, 2026 15:46	Dominique Garmier	CPPclang++18.1.3	Success	3,798+142.92 RP
Mar 23, 2026 15:45	Dominique Garmier	CPPg++13.3.0	Success	4,016+29.41 RP
Mar 23, 2026 06:37	Dominique Garmier	CPPg++13.3.0	Success	4,472
Mar 23, 2026 06:36	Dominique Garmier	CPPg++13.3.0	Error
Mar 23, 2026 06:35	Dominique Garmier	CPPg++13.3.0	Error
Mar 23, 2026 06:34	Dominique Garmier	CPPg++13.3.0	Error
Mar 23, 2026 06:05	olliecrow	CPPg++13.3.0	Success	3,413
Mar 23, 2026 05:45	Dominique Garmier	CPPg++13.3.0	Success	4,662
Mar 23, 2026 05:43	Dominique Garmier	CPPclang++18.1.3	Success	4,221
Mar 23, 2026 05:41	Dominique Garmier	CPPg++13.3.0	Success	5,270
Mar 23, 2026 05:20	Dominique Garmier	CPPg++13.3.0	Success	5,247
Mar 23, 2026 05:20	Dominique Garmier	CPPclang++18.1.3	Error
Mar 23, 2026 05:08	Dominique Garmier	CPPclang++18.1.3	Success	4,203
Mar 23, 2026 05:07	Dominique Garmier	CPPg++13.3.0	Success	4,950
Mar 23, 2026 04:56	Dominique Garmier	CPPg++13.3.0	Success	5,004
Mar 23, 2026 04:17	Dominique Garmier	CPPg++13.3.0	Success	5,005
Mar 23, 2026 03:48	Dominique Garmier	CPPg++13.3.0	Success	5,008
Mar 23, 2026 03:40	Dominique Garmier	CPPg++13.3.0	Success	4,997
Mar 23, 2026 03:06	Dominique Garmier	CPPg++13.3.0	Success	4,477
Mar 23, 2026 03:03	Dominique Garmier	CPPg++13.3.0	Success	4,298
Mar 23, 2026 02:33	Dominique Garmier	CPPg++13.3.0	Success	4,270
Mar 23, 2026 01:15	Dominique Garmier	CPPg++13.3.0	Success	4,998
Mar 23, 2026 01:12	Dominique Garmier	CPPclang++18.1.3	Error
Mar 23, 2026 01:11	Dominique Garmier	CPPg++13.3.0	Success	4,120
Mar 23, 2026 01:09	Dominique Garmier	CPPg++13.3.0	Success	4,064+97.68 RP
Mar 23, 2026 01:05	Dominique Garmier	CPPg++13.3.0	Success	4,279
Mar 23, 2026 01:04	Dominique Garmier	CPPg++13.3.0	Success	4,238
Mar 23, 2026 01:02	Dominique Garmier	CPPg++13.3.0	Error
Mar 23, 2026 00:45	Dominique Garmier	CPPg++13.3.0	Success	5,595
Mar 23, 2026 00:42	Dominique Garmier	CPPg++10.5.0	Success	5,384
Mar 22, 2026 21:24	Dominique Garmier	CPPg++13.3.0	Success	5,948
Mar 22, 2026 21:23	Dominique Garmier	CPPg++13.3.0	Success	5,494
Mar 22, 2026 21:21	Dominique Garmier	CPPg++13.3.0	Success	5,310
Mar 22, 2026 21:19	Dominique Garmier	CPPg++13.3.0	Success	5,423
Mar 22, 2026 21:18	Dominique Garmier	CPPclang++18.1.3	Success	5,442
Mar 22, 2026 19:41	Dominique Garmier	ZIG0.13.0	Success	252,397+7.41 RP
Mar 22, 2026 19:41	Dominique Garmier	GOgo1.26.1	Success	90,762
Mar 22, 2026 19:22	Dominique Garmier	GOgo1.26.1	Success	88,373
Mar 22, 2026 18:50	Dominique Garmier	CSHARP9.0.14	Success	55,480
Mar 22, 2026 17:06	Dominique Garmier	RUSTrust-1.94.0	Success	22,647
Mar 22, 2026 16:59	Dominique Garmier	GOgo1.26.1	Success	83,351
Mar 22, 2026 13:52	Dominique Garmier	CPPclang++18.1.3	Success	5,254
Mar 22, 2026 11:19	Dominique Garmier	CPPg++13.3.0	Success	5,719
Mar 21, 2026 21:42	Yuriy Lyfenko	CPPclang++18.1.3	Success	13,638
Mar 21, 2026 21:41	Yuriy Lyfenko	CPPg++13.3.0	Success	3,953
Mar 21, 2026 21:33	Yuriy Lyfenko	CPPg++13.3.0	Success	3,934
Mar 21, 2026 21:33	Yuriy Lyfenko	CPPg++13.3.0	Success	3,946
Mar 21, 2026 21:32	Yuriy Lyfenko	CPPg++13.3.0	Success	14,550
Mar 21, 2026 21:31	Yuriy Lyfenko	CPPclang++18.1.3	Success	13,683
Mar 21, 2026 19:54	Dominique Garmier	GOgo1.26.1	Success	40,467
Mar 21, 2026 19:49	Dominique Garmier	GOgo1.26.1	Success	64,515
Mar 21, 2026 19:48	Dominique Garmier	GOgo1.26.1	Success	55,132
Mar 21, 2026 16:28	Dominique Garmier	RUSTrust-1.94.0	Success	4,663
Mar 21, 2026 16:25	Dominique Garmier	RUSTrust-1.94.0	Success	4,658
Mar 21, 2026 16:23	Dominique Garmier	RUSTrust-1.94.0	Success	4,667
Mar 21, 2026 16:21	Dominique Garmier	RUSTrust-1.94.0	Success	4,740
Mar 21, 2026 16:19	Dominique Garmier	RUSTrust-1.94.0	Success	4,671
Mar 21, 2026 16:18	Dominique Garmier	RUSTrust-1.94.0	Success	4,660
Mar 21, 2026 16:16	Dominique Garmier	RUSTrust-1.94.0	Success	4,968
Mar 21, 2026 16:14	Dominique Garmier	RUSTrust-1.94.0	Success	4,557
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

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