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 11, 2026 02:12	izotoff	CPPg++13.3.0	Error
Mar 11, 2026 02:04	izotoff	CPPg++13.3.0	Success	4,607
Mar 11, 2026 01:58	izotoff	CPPg++13.3.0	Success	24,348
Mar 11, 2026 01:57	izotoff	CPPg++13.3.0	Success	12,263
Mar 11, 2026 01:55	izotoff	CPPg++13.3.0	Success	12,288
Mar 11, 2026 01:53	izotoff	CPPg++13.3.0	Success	12,325
Mar 11, 2026 01:42	izotoff	CPPg++13.3.0	Success	5,713
Mar 11, 2026 01:41	izotoff	CPPg++13.3.0	Success	5,758
Mar 10, 2026 22:19	izotoff	CPPg++13.3.0	Success	4,341
Mar 10, 2026 22:18	izotoff	CPPg++13.3.0	Success	4,332
Mar 10, 2026 22:11	izotoff	CPPg++13.3.0	Success	4,334
Mar 10, 2026 22:06	izotoff	CPPg++13.3.0	Success	4,350
Mar 10, 2026 22:00	izotoff	CPPg++13.3.0	Success	12,704
Mar 10, 2026 21:50	izotoff	CPPg++13.3.0	Error
Mar 10, 2026 21:48	izotoff	CPPg++13.3.0	Error
Mar 10, 2026 21:37	izotoff	CPPg++13.3.0	Success	54,181
Mar 10, 2026 21:33	izotoff	CPPg++13.3.0	Success	4,336
Mar 10, 2026 21:12	izotoff	CPPg++13.3.0	Success	4,333
Mar 10, 2026 21:11	izotoff	CPPclang++18.1.3	Error
Mar 10, 2026 21:10	izotoff	CPPg++13.3.0	Success	4,331+185.79 RP
Mar 10, 2026 21:08	izotoff	CPPg++13.3.0	Success	54,232
Mar 10, 2026 21:06	izotoff	CPPg++13.3.0	Success	53,845
Mar 10, 2026 21:05	izotoff	CPPg++13.3.0	Success	55,613
Mar 10, 2026 21:03	izotoff	CPPg++13.3.0	Error
Mar 10, 2026 07:02	olliecrow	CPPg++13.3.0	Success	3,411
Mar 10, 2026 06:55	olliecrow	CPPg++13.3.0	Success	3,411
Mar 10, 2026 05:52	olliecrow	CPPg++13.3.0	Success	3,412
Mar 10, 2026 05:48	olliecrow	CPPg++13.3.0	Success	3,419
Mar 10, 2026 05:44	olliecrow	CPPg++13.3.0	Success	3,413
Mar 10, 2026 05:41	olliecrow	CPPg++13.3.0	Success	3,413
Mar 10, 2026 05:37	olliecrow	CPPg++13.3.0	Success	3,412
Mar 10, 2026 05:33	olliecrow	CPPg++13.3.0	Success	3,413
Mar 10, 2026 05:28	olliecrow	CPPg++13.3.0	Success	3,411+2.58 RP
Mar 10, 2026 05:23	olliecrow	CPPg++13.3.0	Success	3,414+15.36 RP
Mar 10, 2026 05:19	olliecrow	CPPg++13.3.0	Success	3,432+0.85 RP
Mar 10, 2026 05:15	olliecrow	CPPg++13.3.0	Success	3,434
Mar 10, 2026 05:11	olliecrow	CPPg++13.3.0	Success	3,446
Mar 10, 2026 05:07	olliecrow	CPPg++13.3.0	Success	3,436
Mar 10, 2026 05:03	olliecrow	CPPg++13.3.0	Success	3,433+9.30 RP
Mar 10, 2026 04:59	olliecrow	CPPg++13.3.0	Error
Mar 10, 2026 04:55	olliecrow	CPPg++13.3.0	Success	3,445
Mar 10, 2026 04:51	olliecrow	CPPg++13.3.0	Success	3,456
Mar 10, 2026 03:31	olliecrow	CPPg++13.3.0	Success	3,444+54.60 RP
Mar 5, 2026 22:50	Sergey Serebryakov	CPPg++13.3.0	Success	3,332+3'001.20 RP
Mar 5, 2026 22:49	Sergey Serebryakov	CPPg++13.3.0	Error
Mar 5, 2026 07:50	Daniel	RUSTrust-1.93.1	Success	3,976+6.31 RP
Mar 5, 2026 07:47	Daniel	RUSTrust-1.93.1	Error
Mar 5, 2026 07:45	Daniel	RUSTrust-1.93.1	Error
Mar 5, 2026 07:43	Daniel	RUSTrust-1.93.1	Error
Mar 5, 2026 07:41	Daniel	RUSTrust-1.93.1	Error
Mar 5, 2026 07:39	Daniel	RUSTrust-1.93.1	Success	3,986
Mar 5, 2026 07:38	Daniel	RUSTrust-1.93.1	Success	4,005
Mar 5, 2026 07:38	Daniel	RUSTrust-1.93.1	Success	3,986+10.65 RP
Mar 5, 2026 07:37	Daniel	RUSTrust-1.93.1	Success	4,003+16.74 RP
Mar 5, 2026 07:33	Daniel	RUSTrust-1.93.1	Error
Mar 5, 2026 07:33	Daniel	RUST	Success	5,025
Mar 5, 2026 05:41	Daniel	RUSTrust-1.93.1	Success	4,059
Mar 5, 2026 05:41	Daniel	RUSTrust-1.93.1	Success	6,059
Mar 5, 2026 05:38	Daniel	RUSTrust-1.93.1	Error
Mar 5, 2026 05:35	Daniel	RUSTrust-1.93.1	Success	4,057
Mar 5, 2026 05:34	Daniel	RUSTrust-1.93.1	Success	4,030+29.81 RP
Mar 5, 2026 05:34	Daniel	RUSTrust-1.93.1	Success	4,079+46.58 RP
Mar 5, 2026 05:33	Daniel	RUSTrust-1.93.1	Success	4,158+96.60 RP
Mar 5, 2026 05:32	Daniel	RUSTrust-1.93.1	Success	4,332+9.02 RP
Mar 5, 2026 05:32	Daniel	RUSTrust-1.93.1	Success	4,349+31.81 RP
Mar 5, 2026 05:31	Daniel	RUSTrust-1.93.1	Success	4,767
Mar 5, 2026 05:30	Daniel	RUSTrust-1.93.1	Error
Mar 5, 2026 05:25	Daniel	RUSTrust-1.93.1	Success	18,862
Mar 5, 2026 05:20	Daniel	RUSTrust-1.93.1	Success	4,410+46.34 RP
Mar 5, 2026 05:18	Daniel	RUSTrust-1.93.1	Success	4,502+106.18 RP
Mar 5, 2026 00:02	olliecrow	CPPg++13.3.0	Success	3,510
Mar 4, 2026 23:51	olliecrow	CPPg++13.3.0	Success	3,512
Mar 4, 2026 23:43	olliecrow	CPPg++13.3.0	Success	3,510+3.24 RP
Mar 4, 2026 23:20	olliecrow	CPPg++13.3.0	Recalculating
Mar 4, 2026 23:14	olliecrow	CPPg++13.3.0	Success	4,292
Mar 4, 2026 23:09	olliecrow	CPPg++13.3.0	Success	4,060
Mar 4, 2026 23:03	olliecrow	CPPg++13.3.0	Success	3,515
Mar 4, 2026 22:53	olliecrow	CPPg++13.3.0	Success	3,518
Mar 4, 2026 22:48	olliecrow	CPPg++13.3.0	Success	3,516
Mar 4, 2026 22:43	olliecrow	CPPg++13.3.0	Success	3,681
Mar 4, 2026 22:37	olliecrow	CPPg++13.3.0	Success	3,691
Mar 4, 2026 22:27	olliecrow	CPPg++13.3.0	Success	3,562
Mar 4, 2026 22:22	olliecrow	CPPg++13.3.0	Success	3,521
Mar 4, 2026 22:18	olliecrow	CPPg++13.3.0	Success	3,516
Mar 4, 2026 22:14	olliecrow	CPPg++13.3.0	Success	3,514+40.71 RP
Mar 4, 2026 22:10	olliecrow	CPPclang++18.1.3	Success	3,570
Mar 4, 2026 22:06	olliecrow	CPPg++13.3.0	Success	3,565
Mar 4, 2026 22:01	olliecrow	CPPg++13.3.0	Success	3,574
Mar 4, 2026 21:57	olliecrow	CPPg++13.3.0	Success	3,780
Mar 4, 2026 21:53	olliecrow	CPPg++13.3.0	Success	3,565
Mar 4, 2026 21:49	olliecrow	CPPg++13.3.0	Success	3,567
Mar 4, 2026 21:46	olliecrow	CPPg++13.3.0	Success	3,565+17.98 RP
Mar 4, 2026 21:42	olliecrow	CPPg++13.3.0	Success	3,588+0.78 RP
Mar 4, 2026 21:38	olliecrow	CPPg++13.3.0	Success	3,589
Mar 4, 2026 21:34	olliecrow	CPPg++13.3.0	Success	3,589+20.04 RP
Mar 4, 2026 21:28	olliecrow	CPPg++13.3.0	Success	3,618
Mar 4, 2026 21:24	olliecrow	CPPg++13.3.0	Success	3,617
Mar 4, 2026 21:20	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 21:16	olliecrow	CPPclang++18.1.3	Success	3,632
Mar 4, 2026 21:12	olliecrow	CPPg++13.3.0	Success	3,616

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