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
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
May 13, 2026 22:47	Aleksei Shahoika	CPPclang++18.1.3	Success	3,183+135.98 RP
May 13, 2026 22:40	Aleksei Shahoika	CPPclang++18.1.3	Success	3,327+95.35 RP
May 13, 2026 22:34	Aleksei Shahoika	CPPclang++18.1.3	Success	3,436+67.03 RP
May 13, 2026 22:27	Aleksei Shahoika	CPPclang++18.1.3	Success	3,517+229.64 RP
May 13, 2026 22:17	Aleksei Shahoika	CPPclang++18.1.3	Success	3,827
May 13, 2026 22:12	Aleksei Shahoika	CPPclang++18.1.3	Success	3,826+274.51 RP
May 13, 2026 22:02	Aleksei Shahoika	CPPclang++18.1.3	Success	13,661
May 13, 2026 21:57	Aleksei Shahoika	CPPclang++18.1.3	Success	4,726
May 13, 2026 21:33	Aleksei Shahoika	CPPclang++18.1.3	Success	5,102
May 13, 2026 21:26	Aleksei Shahoika	CPPclang++18.1.3	Success	4,275+415.73 RP
May 13, 2026 21:21	Aleksei Shahoika	CPPclang++18.1.3	Success	5,199+1'113.80 RP
May 13, 2026 21:17	Aleksei Shahoika	CPPclang++18.1.3	Success	13,615
May 7, 2026 06:46	Victor Mercklé	CPPg++14.2.0	Error
May 7, 2026 06:37	olliecrow	CPPg++13.3.0	Success	3,186
May 7, 2026 01:46	olliecrow	CPPg++13.3.0	Success	3,404
May 6, 2026 14:08	olliecrow	CPPg++14.2.0	Success	3,199
May 6, 2026 13:21	olliecrow	GOgo1.26.2	Success	42,793
May 6, 2026 10:16	olliecrow	CSHARP9.0.15	Success	3,176
May 6, 2026 09:44	olliecrow	GOgo1.26.2	Error
May 6, 2026 05:54	olliecrow	GOgo1.26.2	Error
May 6, 2026 05:45	olliecrow	RUSTrust-1.95.0	Success	3,166
May 6, 2026 00:17	olliecrow	CPPg++14.2.0	Success	3,554
May 5, 2026 22:26	olliecrow	CPPg++14.2.0	Success	3,165
May 5, 2026 17:44	Hung T.Nguyen	CPPg++10.5.0	Success	7,678+1'302.42 RP
May 5, 2026 17:42	Hung T.Nguyen	CPPg++10.5.0	Error
May 5, 2026 10:25	Victor Mercklé	CPPg++14.2.0	Success	1,893
May 5, 2026 10:07	Victor Mercklé	CPPg++14.2.0	Success	1,895
May 5, 2026 08:02	olliecrow	CPPclang++18.1.3	Success	3,162
May 5, 2026 07:35	olliecrow	CPPg++14.2.0	Success	3,163
May 5, 2026 07:31	olliecrow	CPPg++14.2.0	Success	3,162+5.99 RP
May 5, 2026 06:09	olliecrow	CPPg++14.2.0	Success	3,168+1.99 RP
May 4, 2026 13:34	Victor Mercklé	CPPg++14.2.0	Success	1,829+94.82 RP
May 1, 2026 08:22	Dominique Garmier	CPPg++14.2.0	Success	3,233
May 1, 2026 08:21	Dominique Garmier	CPPg++14.2.0	Success	3,230+42.54 RP
May 1, 2026 08:20	Dominique Garmier	CPPg++14.2.0	Success	3,275+0.93 RP
May 1, 2026 06:34	Charles Cabergs	CPPg++13.3.0	Success	3,812
May 1, 2026 03:59	Charles Cabergs	CPPg++14.2.0	Success	3,807
May 1, 2026 02:39	olliecrow	RUSTrust-1.95.0	Success	3,180
Apr 30, 2026 19:30	Charles Cabergs	CPPg++13.3.0	Success	3,806+6.20 RP
Apr 30, 2026 14:27	Charles Cabergs	CPPg++13.3.0	Success	3,816
Apr 30, 2026 11:38	Charles Cabergs	CPPg++13.3.0	Success	3,821
Apr 30, 2026 09:15	Charles Cabergs	CPPg++13.3.0	Success	3,815+0.69 RP
Apr 30, 2026 03:46	Charles Cabergs	CPPg++13.3.0	Success	3,816+4.11 RP
Apr 30, 2026 01:11	Charles Cabergs	CPPg++13.3.0	Success	3,822
Apr 29, 2026 20:02	Charles Cabergs	CPPg++13.3.0	Success	3,822
Apr 29, 2026 11:38	Dominique Garmier	CPPg++13.3.0	Success	3,282
Apr 29, 2026 11:37	Dominique Garmier	CPPg++13.3.0	Success	3,278
Apr 29, 2026 11:18	Dominique Garmier	CPPg++13.3.0	Success	3,281
Apr 29, 2026 04:57	olliecrow	ZIG0.15.1	Success	3,185
Apr 29, 2026 04:44	olliecrow	CSHARP9.0.14	Success	3,188
Apr 29, 2026 04:19	olliecrow	GOgo1.26.2	Success	3,186
Apr 28, 2026 20:41	olliecrow	ZIG0.14.0	Success	3,180
Apr 28, 2026 20:15	olliecrow	CSHARP9.0.14	Success	3,205
Apr 28, 2026 17:52	Charles Cabergs	CPPg++13.3.0	Success	3,822+6.83 RP

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