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
Nov 4, 2026 03:06	Andrew Epstein	CSHARP9.0.18	Success	1,546+53.94 RP
Nov 4, 2026 03:05	Andrew Epstein	ZIG0.15.1	Success	1,543+66.51 RP
Nov 4, 2026 03:04	Andrew Epstein	RUSTrust-1.95.0	Success	1,542+74.92 RP
Nov 4, 2026 03:04	Andrew Epstein	GOgo1.26.2	Success	1,546+37.44 RP
Nov 4, 2026 02:55	Andrew Epstein	CPPg++14.2.0	Success	1,543+12.59 RP
Nov 4, 2026 02:53	Andrew Epstein	CPPg++14.2.0	Success	15,457
Nov 4, 2026 02:48	Andrew Epstein	CPPg++14.2.0	Success	15,546
Nov 4, 2026 02:47	Andrew Epstein	CPPg++14.2.0	Success	1,545+8.37 RP
Nov 4, 2026 02:45	Andrew Epstein	CPPg++14.2.0	Success	23,218
Nov 4, 2026 02:38	Andrew Epstein	CPPg++14.2.0	Success	18,734
Nov 4, 2026 02:36	Andrew Epstein	CPPg++14.2.0	Success	1,547+20.83 RP
Nov 4, 2026 02:34	Andrew Epstein	CPPg++14.2.0	Success	18,682
Nov 4, 2026 02:30	Andrew Epstein	CPPg++14.2.0	Success	1,573
Nov 4, 2026 02:28	Andrew Epstein	CPPg++14.2.0	Success	1,568
Nov 4, 2026 02:27	Andrew Epstein	CPPg++14.2.0	Success	1,552+16.56 RP
Nov 4, 2026 02:25	Andrew Epstein	CPPg++14.2.0	Success	18,785
Nov 4, 2026 02:04	Andrew Epstein	CPPg++14.2.0	Success	23,420
Nov 4, 2026 01:58	Andrew Epstein	CPPg++14.2.0	Success	23,367
Nov 4, 2026 01:54	Andrew Epstein	CPPg++14.2.0	Success	23,660
Nov 4, 2026 01:48	Andrew Epstein	CPPg++14.2.0	Success	23,434
Nov 4, 2026 01:37	Andrew Epstein	CPPg++14.2.0	Success	1,556+8.25 RP
Nov 4, 2026 01:35	Andrew Epstein	CPPg++14.2.0	Success	23,402
Nov 4, 2026 01:29	Andrew Epstein	CPPg++14.2.0	Success	1,558+8.23 RP
Nov 4, 2026 01:26	Andrew Epstein	CPPg++14.2.0	Success	15,614
Nov 4, 2026 01:24	Andrew Epstein	CPPg++14.2.0	Success	23,595
Nov 4, 2026 01:10	Andrew Epstein	CPPg++14.2.0	Success	23,562
Nov 4, 2026 01:03	Andrew Epstein	CPPg++14.2.0	Success	23,465
Nov 4, 2026 00:56	Andrew Epstein	CPPg++14.2.0	Success	23,629
Nov 4, 2026 00:56	Andrew Epstein	CPPg++14.2.0	Success	1,560+24.56 RP
Nov 4, 2026 00:52	Andrew Epstein	CPPg++14.2.0	Success	18,902
Nov 4, 2026 00:47	Andrew Epstein	CPPg++14.2.0	Success	23,675
Nov 4, 2026 00:45	Andrew Epstein	CPPg++14.2.0	Success	1,566+20.32 RP
Nov 4, 2026 00:43	Andrew Epstein	CPPg++14.2.0	Success	23,559
Nov 4, 2026 00:39	Andrew Epstein	CPPg++14.2.0	Success	1,571+8.09 RP
Nov 4, 2026 00:32	Andrew Epstein	CPPg++14.2.0	Success	23,631
Nov 4, 2026 00:26	Andrew Epstein	CPPg++14.2.0	Success	1,573
Nov 4, 2026 00:25	Andrew Epstein	CPPg++14.2.0	Success	18,990
Nov 4, 2026 00:16	Andrew Epstein	CPPg++14.2.0	Success	9,518
Nov 4, 2026 00:12	Andrew Epstein	CPPclang++18.1.3	Success	1,595
Nov 4, 2026 00:11	Andrew Epstein	CPPg++14.2.0	Success	15,855
Nov 4, 2026 00:03	Andrew Epstein	CPPg++14.2.0	Success	1,573+12.10 RP
Nov 4, 2026 00:00	Andrew Epstein	CPPg++14.2.0	Success	15,779
Nov 3, 2026 23:32	Andrew Epstein	CPPg++14.2.0	Success	1,616
Nov 3, 2026 23:22	Andrew Epstein	CPPg++14.2.0	Success	19,040
Oct 21, 2026 06:11	e1011	CPPg++10.5.0	Success	56,236
Oct 21, 2026 06:07	e1011	CPPg++10.5.0	Success	56,195
Oct 21, 2026 06:06	e1011	CPPg++10.5.0	Success	56,219
Oct 21, 2026 06:06	e1011	CPPg++10.5.0	Success	56,221
Oct 21, 2026 06:06	e1011	CPPg++10.5.0	Success	56,211
Oct 21, 2026 06:05	e1011	CPPg++10.5.0	Success	56,199
Oct 21, 2026 05:53	e1011	CPPg++10.5.0	Success	5,781+1'097.73 RP
Oct 21, 2026 05:23	e1011	CPPg++10.5.0	Success	16,126
Oct 21, 2026 05:23	e1011	CPPg++10.5.0	Success	19,275
Oct 21, 2026 05:23	e1011	CPPg++10.5.0	Success	16,866
Oct 21, 2026 05:23	e1011	CPPg++10.5.0	Success	15,821+11.30 RP
Oct 21, 2026 05:23	e1011	CPPg++10.5.0	Success	16,109+2.07 RP
Oct 21, 2026 04:09	e1011	CPPg++10.5.0	Success	32,356
Oct 21, 2026 04:07	e1011	CPPg++10.5.0	Success	23,328
Oct 21, 2026 04:07	e1011	CPPg++10.5.0	Success	18,114
Oct 21, 2026 03:58	e1011	CPPg++10.5.0	Success	16,174
Oct 21, 2026 03:58	e1011	CPPg++10.5.0	Success	16,198
Oct 21, 2026 03:56	e1011	CPPg++10.5.0	Success	16,379
Oct 21, 2026 03:56	e1011	CPPg++10.5.0	Success	16,236
Oct 21, 2026 03:55	e1011	CPPg++10.5.0	Success	16,163+4.07 RP
Oct 21, 2026 03:55	e1011	CPPg++10.5.0	Success	16,270+0.87 RP
Oct 21, 2026 03:55	e1011	CPPg++10.5.0	Success	19,345
Oct 21, 2026 03:55	e1011	CPPg++10.5.0	Success	17,639
Oct 21, 2026 03:53	e1011	CPPg++10.5.0	Success	16,293+98.27 RP
Oct 21, 2026 03:50	e1011	CPPg++10.5.0	Success	22,875
Oct 21, 2026 03:50	e1011	CPPg++10.5.0	Success	22,943
Oct 21, 2026 03:48	e1011	CPPg++10.5.0	Success	22,896
Oct 21, 2026 03:47	e1011	CPPg++10.5.0	Success	24,017
Oct 21, 2026 03:45	e1011	CPPg++10.5.0	Success	23,356
Oct 21, 2026 03:44	e1011	CPPg++10.5.0	Success	23,038
Oct 21, 2026 01:24	e1011	CPPg++10.5.0	Success	24,382
Oct 21, 2026 01:23	e1011	CPPg++10.5.0	Error
Oct 21, 2026 01:15	e1011	CPPg++10.5.0	Success	19,399+0.42 RP
Oct 21, 2026 01:15	e1011	CPPg++10.5.0	Error
Oct 21, 2026 01:12	e1011	CPPg++10.5.0	Success	19,415+104.10 RP
Oct 21, 2026 01:05	e1011	CPPg++10.5.0	Success	24,333+159.78 RP
Oct 21, 2026 01:04	e1011	CPPg++10.5.0	Error
Oct 21, 2026 01:02	e1011	CPPg++10.5.0	Error
Oct 21, 2026 00:48	e1011	CPPg++10.5.0	Success	39,812+76.20 RP
Oct 21, 2026 00:47	e1011	CPPg++10.5.0	Success	63,092
Oct 21, 2026 00:44	e1011	CPPg++10.5.0	Success	63,300
Oct 21, 2026 00:42	e1011	CPPg++10.5.0	Error
Oct 21, 2026 00:36	e1011	CPPg++10.5.0	Success	63,040
Oct 21, 2026 00:30	e1011	CPPg++10.5.0	Error
Oct 21, 2026 00:28	e1011	CPPg++10.5.0	Success	88,891
Oct 21, 2026 00:24	e1011	CPPg++10.5.0	Success	77,819
Oct 21, 2026 00:18	e1011	CPPg++10.5.0	Success	62,847
Oct 20, 2026 21:33	e1011	CPPg++10.5.0	Success	57,150+174.98 RP
Oct 19, 2026 13:59	highload-churner	CPPclang++18.1.3	Success	1,570
Oct 19, 2026 13:58	highload-churner	CPPclang++18.1.3	Success	1,544+66.76 RP
Oct 19, 2026 13:51	highload-churner	CPPclang++18.1.3	Success	1,597
Oct 19, 2026 13:21	highload-churner	CPPclang++18.1.3	Success	1,552+8.30 RP
Oct 19, 2026 13:14	highload-churner	CPPclang++18.1.3	Success	1,553+122.32 RP
Oct 19, 2026 12:42	highload-churner	CPPclang++18.1.3	Success	1,581+136.99 RP
Oct 19, 2026 12:19	highload-churner	CPPclang++18.1.3	Success	1,616+1'198.10 RP
Oct 19, 2026 08:11	highload-churner	CPPclang++18.1.3	Success	2,004+19.84 RP

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