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 28, 2026 15:11	Charles Cabergs	CPPg++13.3.0	Success	3,834
Apr 28, 2026 13:31	Dominique Garmier	CPPg++13.3.0	Success	3,282
Apr 28, 2026 09:27	TudyM	CPPg++14.2.0	Success	5,329
Apr 28, 2026 09:25	TudyM	CPPg++14.2.0	Success	5,325+49.45 RP
Apr 28, 2026 09:21	TudyM	CPPg++14.2.0	Success	5,492
Apr 28, 2026 09:18	TudyM	CPPg++14.2.0	Success	24,792
Apr 28, 2026 09:16	TudyM	CPPg++14.2.0	Success	9,341
Apr 28, 2026 09:14	TudyM	CPPg++14.2.0	Success	5,469
Apr 28, 2026 09:13	TudyM	CPPg++14.2.0	Success	5,793
Apr 28, 2026 09:11	TudyM	CPPg++14.2.0	Success	5,516
Apr 28, 2026 09:09	TudyM	CPPg++14.2.0	Success	5,524
Apr 28, 2026 09:06	TudyM	CPPg++14.2.0	Success	5,483
Apr 28, 2026 09:04	TudyM	CPPg++14.2.0	Success	5,469+4.00 RP
Apr 28, 2026 09:02	TudyM	CPPg++14.2.0	Success	5,481+8.28 RP
Apr 28, 2026 08:58	TudyM	CPPg++14.2.0	Success	5,506+0.66 RP
Apr 28, 2026 08:57	TudyM	CPPg++13.3.0	Success	5,526
Apr 28, 2026 08:56	TudyM	CPPg++14.2.0	Success	5,508+28.87 RP
Apr 28, 2026 08:54	TudyM	CPPclang++20.1.2	Success	5,836
Apr 28, 2026 08:51	TudyM	CPPclang++20.1.2	Success	5,665
Apr 28, 2026 08:49	TudyM	CPPclang++20.1.2	Success	5,651
Apr 28, 2026 08:48	TudyM	CPPclang++20.1.2	Success	5,601
Apr 28, 2026 08:47	TudyM	CPPclang++20.1.2	Success	5,661
Apr 28, 2026 08:45	TudyM	CPPclang++20.1.2	Success	6,113
Apr 28, 2026 08:44	TudyM	CPPclang++20.1.2	Success	6,044
Apr 28, 2026 08:42	TudyM	CPPclang++20.1.2	Success	5,597+3.19 RP
Apr 28, 2026 08:40	TudyM	CPPclang++20.1.2	Success	5,700
Apr 28, 2026 08:39	TudyM	CPPclang++20.1.2	Success	5,927
Apr 28, 2026 08:37	TudyM	CPPclang++20.1.2	Success	6,161
Apr 28, 2026 08:35	TudyM	CPPclang++20.1.2	Success	5,888
Apr 28, 2026 08:33	TudyM	CPPclang++20.1.2	Success	5,607+39.50 RP
Apr 28, 2026 08:28	TudyM	CPPclang++20.1.2	Success	5,759
Apr 28, 2026 08:25	TudyM	CPPclang++20.1.2	Success	5,734+228.14 RP
Apr 28, 2026 08:23	TudyM	CPPclang++20.1.2	Success	6,597+314.21 RP
Apr 28, 2026 08:20	TudyM	CPPclang++20.1.2	Success	20,793
Apr 28, 2026 08:17	TudyM	CPPclang++20.1.2	Success	18,600
Apr 28, 2026 04:03	Charles Cabergs	CPPg++13.3.0	Success	3,838
Apr 28, 2026 02:09	Charles Cabergs	CPPg++13.3.0	Success	3,832+3.40 RP
Apr 27, 2026 23:38	Victor Mercklé	CPPg++14.2.0	Success	7,581
Apr 27, 2026 23:29	Victor Mercklé	CPPg++14.2.0	Success	13,282
Apr 27, 2026 23:22	Victor Mercklé	CPPg++14.2.0	Error
Apr 27, 2026 20:52	Charles Cabergs	CPPg++13.3.0	Success	3,883
Apr 27, 2026 00:20	Charles Cabergs	CPPg++13.3.0	Success	3,839
Apr 26, 2026 20:12	TudyM	CPPg++14.2.0	Success	9,195
Apr 26, 2026 20:07	TudyM	CPPclang++20.1.2	Success	8,322+108.38 RP
Apr 26, 2026 18:24	TudyM	CPPg++10.5.0	Success	25,744
Apr 26, 2026 18:22	TudyM	CPPg++10.5.0	Success	12,635
Apr 26, 2026 17:58	Victor Mercklé	ZIG0.16.0	Success	1,869+2'418.76 RP
Apr 26, 2026 17:54	Victor Mercklé	RUSTrust-1.95.0	Success	1,860+1'954.03 RP
Apr 26, 2026 17:35	Victor Mercklé	GOgo1.26.2	Success	1,857+2'273.64 RP
Apr 26, 2026 17:20	TudyM	CPPg++10.5.0	Success	9,147+1'093.25 RP
Apr 26, 2026 16:49	Victor Mercklé	CSHARP10.0.7	Success	1,856+2'619.38 RP
Apr 26, 2026 16:39	Victor Mercklé	CPPg++14.2.0	Success	1,846
Apr 26, 2026 16:30	Victor Mercklé	CSHARP10.0.7	Success	40,481
Apr 26, 2026 16:03	Victor Mercklé	CSHARP8.0.26	Error
Apr 26, 2026 16:03	Victor Mercklé	CPPg++14.2.0	Success	1,846
Apr 26, 2026 15:48	Victor Mercklé	CPPg++14.2.0	Success	1,848
Apr 26, 2026 15:30	Victor Mercklé	CPPg++14.2.0	Success	3,862
Apr 26, 2026 15:27	Victor Mercklé	CPPg++14.2.0	Success	2,191
Apr 26, 2026 15:26	Victor Mercklé	CSHARP10.0.7	Success	3,881
Apr 26, 2026 15:18	Victor Mercklé	CPPg++14.2.0	Success	1,937
Apr 26, 2026 14:51	Victor Mercklé	CPPg++14.2.0	Success	1,845+1'361.44 RP
Apr 26, 2026 14:47	Victor Mercklé	CPPg++14.2.0	Success	2,110+2'565.44 RP
Apr 26, 2026 14:42	Victor Mercklé	CPPg++14.2.0	Success	2,893+226.21 RP
Apr 26, 2026 14:39	Victor Mercklé	CPPg++14.2.0	Success	3,011+89.09 RP
Apr 26, 2026 14:15	Victor Mercklé	CPPg++14.2.0	Success	3,094+735.81 RP
Apr 26, 2026 12:11	Victor Mercklé	CPPg++14.2.0	Success	4,006+1'882.34 RP
Apr 26, 2026 10:34	Charles Cabergs	CPPg++13.3.0	Success	3,837+7.45 RP
Apr 26, 2026 10:19	olliecrow	CPPg++10.5.0	Success	3,182
Apr 26, 2026 08:06	Charles Cabergs	CPPg++13.3.0	Success	3,892
Apr 26, 2026 05:12	Charles Cabergs	CPPg++13.3.0	Success	3,848+9.42 RP
Apr 26, 2026 04:38	olliecrow	GOgo1.26.2	Success	3,216
Apr 26, 2026 04:16	olliecrow	CPPg++10.5.0	Success	3,181
Apr 26, 2026 02:19	Charles Cabergs	CPPg++13.3.0	Success	3,862
Apr 26, 2026 00:14	olliecrow	GOgo1.26.2	Success	3,214+19.24 RP
Apr 25, 2026 23:58	olliecrow	RUSTrust-1.95.0	Success	3,170+5.96 RP
Apr 25, 2026 23:51	Charles Cabergs	CPPg++13.3.0	Success	3,904
Apr 25, 2026 21:13	Victor Mercklé	CPPg++14.2.0	Success	16,289+41.60 RP
Apr 25, 2026 18:58	Victor Mercklé	CPPg++14.2.0	Success	17,473+572.31 RP
Apr 25, 2026 17:29	olliecrow	GOgo1.26.2	Success	3,234+67.34 RP
Apr 24, 2026 12:47	olliecrow	RUSTrust-1.95.0	Success	3,176+12.84 RP
Apr 24, 2026 12:32	olliecrow	CPPg++10.5.0	Success	3,189+202.37 RP
Apr 24, 2026 02:00	olliecrow	CPPg++10.5.0	Success	3,413
Apr 23, 2026 21:39	Charles Cabergs	CPPg++13.3.0	Success	3,862+84.95 RP
Apr 23, 2026 03:25	olliecrow	RUSTrust-1.95.0	Success	4,797
Apr 22, 2026 17:28	Charles Cabergs	CPPg++13.3.0	Success	4,026
Apr 22, 2026 14:00	Ben	CPPg++14.2.0	Success	4,156
Apr 22, 2026 11:29	olliecrow	RUSTrust-1.95.0	Success	3,480
Apr 22, 2026 10:53	olliecrow	CSHARP9.0.14	Success	4,311
Apr 22, 2026 10:49	olliecrow	CSHARP9.0.15	Error
Apr 22, 2026 01:49	olliecrow	ZIG0.14.0	Success	3,411+3.43 RP
Apr 22, 2026 00:54	olliecrow	CSHARP9.0.14	Success	4,359
Apr 22, 2026 00:42	olliecrow	CSHARP9.0.14	Success	4,689
Apr 21, 2026 18:01	olliecrow	CPPg++10.5.0	Success	3,418
Apr 21, 2026 15:16	Charles Cabergs	CPPg++13.3.0	Success	3,993+39.51 RP
Apr 21, 2026 02:50	olliecrow	CPPg++10.5.0	Success	3,425
Apr 21, 2026 01:30	Taylor Dettling	RUSTrust-1.95.0	Success	7,731+1'293.49 RP
Apr 20, 2026 20:24	Charles Cabergs	CPPg++13.3.0	Success	4,057+4.85 RP
Apr 20, 2026 16:50	Ben	CPPg++14.2.0	Success	4,154
Apr 20, 2026 16:50	Ben	CPPg++13.3.0	Success	4,112+42.99 RP
Apr 20, 2026 16:50	Ben	CPPg++13.3.0	Success	4,186+59.00 RP

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