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
Aug 17, 2026 04:45	marko1597	CPPclang++16.0.6	Success	2,536
Aug 17, 2026 04:26	marko1597	CPPclang++16.0.6	Success	2,443+8.36 RP
Aug 17, 2026 04:26	marko1597	CPPclang++16.0.6	Success	2,448+873.66 RP
Aug 17, 2026 03:48	marko1597	CPPclang++20.1.2	Success	3,115
Aug 17, 2026 03:48	marko1597	CPPclang++16.0.6	Success	3,114+163.45 RP
Aug 17, 2026 03:48	marko1597	CPPg++14.2.0	Success	3,281+624.78 RP
Aug 17, 2026 01:10	marko1597	CPPg++14.2.0	Success	4,127+2'423.07 RP
Aug 17, 2026 00:41	marko1597	CPPg++14.2.0	Error
Aug 17, 2026 00:41	marko1597	CPPg++14.2.0	Error
Aug 16, 2026 23:09	Tomislav Tunkovic	GOgo1.26.2	Success	31,391
Aug 16, 2026 23:09	Tomislav Tunkovic	ZIG0.15.1	Success	1,958
Aug 16, 2026 23:08	Tomislav Tunkovic	RUSTrust-1.95.0	Success	2,032
Aug 15, 2026 17:30	Tomislav Tunkovic	CPPg++13.3.0	Success	1,628+45.12 RP
Aug 15, 2026 17:22	Tomislav Tunkovic	CPPg++13.3.0	Success	1,634+14.96 RP
Aug 15, 2026 17:09	Tomislav Tunkovic	CPPg++13.3.0	Success	1,636+40.90 RP
Aug 15, 2026 16:29	Tomislav Tunkovic	CPPg++13.3.0	Success	1,647
Aug 15, 2026 16:25	Tomislav Tunkovic	CPPg++13.3.0	Success	1,645+58.56 RP
Aug 15, 2026 16:21	Tomislav Tunkovic	CPPg++14.2.0	Success	1,727
Aug 15, 2026 16:17	Tomislav Tunkovic	CPPg++13.3.0	Success	1,661+39.61 RP
Aug 15, 2026 16:15	Tomislav Tunkovic	CPPg++13.3.0	Success	1,673
Aug 15, 2026 16:11	Tomislav Tunkovic	CPPg++13.3.0	Success	1,672+32.02 RP
Aug 15, 2026 16:07	Tomislav Tunkovic	CPPg++13.3.0	Success	1,681+7.07 RP
Aug 15, 2026 16:03	Tomislav Tunkovic	CPPg++13.3.0	Success	1,683+10.57 RP
Aug 15, 2026 15:59	Tomislav Tunkovic	CPPg++13.3.0	Success	1,686+34.97 RP
Aug 15, 2026 15:50	Tomislav Tunkovic	CPPg++13.3.0	Success	1,706
Aug 15, 2026 15:48	Tomislav Tunkovic	CPPg++14.2.0	Success	1,696
Aug 15, 2026 15:42	Tomislav Tunkovic	CPPg++13.3.0	Success	1,696+3.47 RP
Aug 15, 2026 15:38	Tomislav Tunkovic	CPPg++13.3.0	Success	1,867
Aug 15, 2026 15:34	Tomislav Tunkovic	CPPclang++20.1.2	Success	1,739
Aug 15, 2026 15:28	Tomislav Tunkovic	CPPg++13.3.0	Success	1,697+6.94 RP
Aug 15, 2026 15:24	Tomislav Tunkovic	CPPg++13.3.0	Success	1,722
Aug 15, 2026 15:21	Tomislav Tunkovic	CPPg++13.3.0	Success	1,699+105.47 RP
Aug 15, 2026 15:13	Tomislav Tunkovic	CPPg++13.3.0	Success	1,730+62.79 RP
Aug 15, 2026 15:03	Tomislav Tunkovic	CPPg++13.3.0	Success	1,750
Aug 15, 2026 06:37	Tomislav Tunkovic	CPPg++13.3.0	Success	1,752
Aug 15, 2026 06:33	Tomislav Tunkovic	CPPg++13.3.0	Success	1,752
Aug 15, 2026 06:27	Tomislav Tunkovic	CPPg++13.3.0	Success	1,749+13.05 RP
Aug 15, 2026 00:38	Tomislav Tunkovic	CPPg++13.3.0	Success	1,753+240.03 RP
Aug 15, 2026 00:18	Tomislav Tunkovic	CPPg++13.3.0	Success	1,837
Aug 13, 2026 13:51	Tomislav Tunkovic	CPPg++13.3.0	Success	1,831
Aug 13, 2026 13:50	Tomislav Tunkovic	CPPg++13.3.0	Success	1,836
Aug 13, 2026 13:48	Tomislav Tunkovic	CPPg++13.3.0	Success	1,830+17.86 RP
Aug 13, 2026 13:47	Tomislav Tunkovic	CPPg++13.3.0	Success	1,844
Aug 13, 2026 13:46	Tomislav Tunkovic	CPPg++14.2.0	Success	1,838
Aug 13, 2026 13:43	Tomislav Tunkovic	CPPg++13.3.0	Success	1,836+93.30 RP
Aug 11, 2026 10:37	Tomislav Tunkovic	CPPg++14.2.0	Success	1,901
Aug 11, 2026 10:14	Tomislav Tunkovic	CPPg++14.2.0	Success	1,868+5.73 RP
Aug 11, 2026 10:11	Tomislav Tunkovic	CPPg++14.2.0	Success	1,870+147.39 RP
Aug 11, 2026 10:01	Tomislav Tunkovic	CPPg++14.2.0	Success	1,923+162.42 RP
Aug 11, 2026 09:52	Tomislav Tunkovic	CPPg++14.2.0	Success	1,985+92.18 RP
Aug 11, 2026 09:40	Tomislav Tunkovic	CPPg++14.2.0	Success	2,032
Aug 11, 2026 09:25	Tomislav Tunkovic	CPPg++14.2.0	Success	2,034
Aug 11, 2026 09:09	Tomislav Tunkovic	CPPg++14.2.0	Success	2,022+36.42 RP
Aug 11, 2026 08:54	Tomislav Tunkovic	CPPg++14.2.0	Success	2,037+209.93 RP
Aug 11, 2026 08:01	Tomislav Tunkovic	CPPg++14.2.0	Success	2,128+1'218.57 RP
Aug 11, 2026 07:29	Tomislav Tunkovic	CPPg++14.2.0	Success	2,873+278.63 RP
Aug 11, 2026 07:09	Tomislav Tunkovic	CPPg++14.2.0	Success	3,354
Aug 11, 2026 07:09	Tomislav Tunkovic	CPPg++14.2.0	Success	3,123+512.43 RP
Aug 9, 2026 20:58	Tony	CPPg++11.5.0	Success	4,106+1'660.99 RP
Aug 9, 2026 20:56	Tony	CPPg++11.5.0	Success	12,912+605.04 RP
Aug 9, 2026 10:06	Tomislav Tunkovic	CPPg++14.2.0	Success	3,718+404.43 RP
Aug 9, 2026 09:51	Tomislav Tunkovic	CPPg++14.2.0	Success	4,376+20.19 RP
Aug 9, 2026 09:14	Tomislav Tunkovic	CPPg++14.2.0	Success	4,415+2'084.37 RP
Aug 9, 2026 08:41	Tomislav Tunkovic	CPPg++14.2.0	Success	55,361+185.63 RP
Aug 3, 2026 13:00	Victor Mercklé	CSHARP10.0.7	Success	1,638+163.24 RP
Aug 3, 2026 12:55	Victor Mercklé	RUSTrust-1.95.0	Success	1,639+123.99 RP
Aug 3, 2026 12:47	Victor Mercklé	CPPg++14.2.0	Success	1,642
Aug 3, 2026 12:34	Victor Mercklé	CPPg++14.2.0	Success	1,648
Aug 3, 2026 12:26	Victor Mercklé	CPPg++14.2.0	Success	1,638+74.08 RP
Aug 3, 2026 12:13	Victor Mercklé	CPPg++14.2.0	Success	1,678
Aug 3, 2026 05:02	Victor Mercklé	CPPg++14.2.0	Success	1,651
Aug 3, 2026 04:57	Victor Mercklé	CPPg++14.2.0	Success	1,658
Aug 3, 2026 04:51	Victor Mercklé	CPPg++14.2.0	Success	1,726
Aug 3, 2026 04:46	Victor Mercklé	CPPg++14.2.0	Success	2,090
Jul 31, 2026 06:15	Tony	CPPg++10.5.0	Success	57,329+174.43 RP
Jul 30, 2026 00:38	anboto1	CPPg++14.2.0	Success	2,949
Jul 30, 2026 00:30	anboto1	CPPg++10.5.0	Success	2,845
Jul 30, 2026 00:27	anboto1	CPPg++14.2.0	Success	3,218
Jul 30, 2026 00:26	anboto1	CPPg++14.2.0	Success	2,951
Jul 30, 2026 00:25	anboto1	CPPg++14.2.0	Success	3,192
Jul 30, 2026 00:17	anboto1	CPPg++14.2.0	Success	3,212
Jul 30, 2026 00:11	anboto1	CPPg++10.5.0	Success	3,053
Jul 30, 2026 00:09	anboto1	CPPg++14.2.0	Success	3,268
Jul 30, 2026 00:09	anboto1	CPPg++10.5.0	Success	2,857
Jul 30, 2026 00:07	anboto1	CPPg++10.5.0	Success	3,053
Jul 30, 2026 00:05	anboto1	CPPg++14.2.0	Success	2,959
Jul 30, 2026 00:03	anboto1	CPPg++10.5.0	Success	2,866
Jul 30, 2026 00:01	anboto1	CPPg++14.2.0	Success	3,289
Jul 30, 2026 00:00	anboto1	CPPg++10.5.0	Success	3,061
Jul 29, 2026 23:57	anboto1	CPPg++10.5.0	Success	2,828
Jul 29, 2026 23:56	anboto1	CPPg++10.5.0	Success	3,066
Jul 29, 2026 23:55	anboto1	CPPg++14.2.0	Success	3,279
Jul 29, 2026 23:51	anboto1	CPPg++10.5.0	Success	2,845
Jul 29, 2026 23:45	anboto1	CPPg++14.2.0	Success	3,332
Jul 29, 2026 23:41	anboto1	CPPg++14.2.0	Success	3,474
Jul 29, 2026 23:40	anboto1	CPPg++10.5.0	Success	2,869
Jul 29, 2026 23:38	anboto1	CPPg++10.5.0	Success	3,066
Jul 29, 2026 23:34	anboto1	CPPg++14.2.0	Success	3,384
Jul 29, 2026 23:28	anboto1	CPPg++14.2.0	Success	3,383
Jul 29, 2026 23:27	anboto1	CPPg++14.2.0	Success	3,363

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