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
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
Oct 19, 2026 08:03	highload-churner	CPPclang++18.1.3	Success	2,012+104.00 RP
Oct 19, 2026 07:13	highload-churner	CPPclang++18.1.3	Success	2,055+151.42 RP
Oct 18, 2026 09:01	Kacpxer	CPPg++14.2.0	Success	3,720+2'688.17 RP
Oct 17, 2026 07:38	janwww	RUSTrust-1.95.0	Success	1,741
Oct 17, 2026 07:25	janwww	ZIG0.15.1	Success	1,732
Oct 17, 2026 05:27	highload-churner	CPPclang++18.1.3	Success	2,122
Oct 17, 2026 05:27	highload-churner	CPPclang++18.1.3	Success	2,126
Oct 15, 2026 23:33	izotoff	GOgo1.27.2	Success	8,979
Oct 15, 2026 23:09	izotoff	GOgo1.27.2	Success	2,094+42.94 RP
Oct 15, 2026 22:58	izotoff	GOgo1.26.2	Success	2,113+1'616.37 RP
Oct 15, 2026 22:49	izotoff	GOgo1.26.2	Success	3,209+584.59 RP
Oct 15, 2026 22:40	izotoff	GOgo1.26.2	Success	3,950+168.14 RP
Oct 15, 2026 22:31	izotoff	GOgo1.26.2	Success	4,231+54.57 RP
Oct 15, 2026 22:18	izotoff	GOgo1.26.2	Success	4,366+5.00 RP
Oct 15, 2026 22:03	izotoff	GOgo1.26.2	Error
Oct 15, 2026 21:42	izotoff	GOgo1.27.2	Error
Oct 15, 2026 16:31	zayd-ansari-code	CPPg++10.5.0	Success	54,473+188.58 RP
Oct 13, 2026 20:12	Karthik Reddy	ZIG0.15.1	Success	1,562
Oct 13, 2026 20:11	Karthik Reddy	RUSTrust-1.97.0	Success	1,559
Oct 13, 2026 00:52	highload-churner	CPPclang++18.1.3	Success	2,121+72.23 RP
Oct 13, 2026 00:22	highload-churner	CPPclang++18.1.3	Success	2,154+733.22 RP
Oct 12, 2026 21:37	janwww	CPPg++14.2.0	Success	1,722+2'091.11 RP
Oct 9, 2026 23:15	highload-churner	CPPg++14.2.0	Success	2,717
Oct 9, 2026 23:15	highload-churner	CPPg++14.2.0	Success	2,570
Oct 9, 2026 23:15	highload-churner	CPPg++14.2.0	Success	2,558+202.35 RP
Oct 9, 2026 17:22	Karthik Reddy	ZIG0.15.1	Success	1,561
Oct 9, 2026 17:22	Karthik Reddy	RUSTrust-1.95.0	Success	1,565
Oct 9, 2026 16:06	highload-churner	CPPg++14.2.0	Success	2,717
Oct 9, 2026 16:05	highload-churner	CPPg++14.2.0	Success	2,694+227.63 RP
Oct 9, 2026 15:40	Karthik Reddy	ZIG0.15.1	Success	1,560
Oct 9, 2026 15:40	Karthik Reddy	RUSTrust-1.95.0	Success	1,560
Oct 9, 2026 15:24	highload-churner	CPPg++14.2.0	Success	2,870+134.24 RP
Oct 9, 2026 15:23	highload-churner	CPPg++14.2.0	Success	2,985+347.98 RP
Oct 9, 2026 15:23	highload-churner	CPPg++14.2.0	Success	3,331+3'002.10 RP
Oct 9, 2026 14:28	Karthik Reddy	ZIG0.15.1	Success	1,563
Oct 9, 2026 14:27	Karthik Reddy	RUSTrust-1.95.0	Success	1,559
Oct 9, 2026 13:33	janwww	CPPg++14.2.0	Success	2,691+3'535.15 RP
Oct 9, 2026 13:30	Karthik Reddy	ZIG0.15.1	Success	1,561
Oct 9, 2026 13:30	Karthik Reddy	RUSTrust-1.95.0	Success	1,559
Oct 9, 2026 12:42	Karthik Reddy	ZIG0.15.1	Success	1,562
Oct 9, 2026 12:41	Karthik Reddy	RUSTrust-1.95.0	Success	1,560
Oct 9, 2026 11:38	Karthik Reddy	ZIG0.15.1	Success	1,561
Oct 9, 2026 11:38	Karthik Reddy	RUSTrust-1.95.0	Success	1,560
Oct 9, 2026 10:42	Karthik Reddy	ZIG0.15.1	Success	1,565
Oct 9, 2026 10:42	Karthik Reddy	RUSTrust-1.95.0	Success	1,559
Oct 9, 2026 10:19	Karthik Reddy	ZIG0.15.1	Success	1,567
Oct 9, 2026 10:18	Karthik Reddy	RUSTrust-1.95.0	Success	1,559
Oct 9, 2026 08:50	Karthik Reddy	ZIG0.15.1	Success	1,561
Oct 9, 2026 08:48	Karthik Reddy	RUSTrust-1.95.0	Success	1,561
Oct 9, 2026 08:15	Karthik Reddy	GOgo1.26.2	Success	1,555+16.50 RP
Oct 9, 2026 08:13	Karthik Reddy	RUSTrust-1.95.0	Success	1,560
Oct 9, 2026 07:58	Karthik Reddy	ZIG0.15.1	Success	1,561
Oct 9, 2026 07:39	Karthik Reddy	RUSTrust-1.95.0	Success	1,573
Oct 9, 2026 07:12	Karthik Reddy	RUSTrust-1.95.0	Success	1,576
Oct 7, 2026 21:13	CountHarebourg	CPPg++10.5.0	Success	56,428+151.02 RP
Oct 7, 2026 20:18	Karthik Reddy	CPPclang++18.1.3	Success	1,555+130.12 RP
Oct 7, 2026 20:09	Karthik Reddy	CPPclang++18.1.3	Success	1,584+7.96 RP
Oct 7, 2026 19:58	Karthik Reddy	CPPclang++18.1.3	Success	1,586+443.51 RP
Oct 7, 2026 19:15	Karthik Reddy	CPPclang++18.1.3	Success	1,706+202.36 RP
Oct 7, 2026 19:07	Karthik Reddy	CPPclang++18.1.3	Success	1,767+218.61 RP
Oct 7, 2026 18:52	Karthik Reddy	CPPclang++18.1.3	Success	1,838+5'440.70 RP
Oct 6, 2026 06:48	janwww	CPPg++14.2.0	Success	55,267+180.94 RP
Sep 26, 2026 18:23	Kevin Heavey	CSHARP9.0.18	Success	1,559+81.25 RP
Sep 26, 2026 18:21	Kevin Heavey	GOgo1.26.2	Success	1,559+69.19 RP
Sep 26, 2026 18:20	Kevin Heavey	ZIG0.15.1	Success	1,559+113.17 RP
Sep 26, 2026 18:19	Kevin Heavey	RUSTrust-1.95.0	Success	1,559+73.21 RP
Sep 26, 2026 14:56	Kevin Heavey	CPPclang++20.1.2	Success	1,558+16.46 RP
Sep 26, 2026 14:53	Kevin Heavey	CPPclang++20.1.2	Success	1,560+73.54 RP
Sep 26, 2026 14:46	Kevin Heavey	CPPclang++20.1.2	Success	1,569+24.32 RP
Sep 26, 2026 14:38	Kevin Heavey	CPPclang++20.1.2	Success	1,572+44.36 RP
Sep 26, 2026 14:36	Kevin Heavey	CPPclang++20.1.2	Success	1,578
Sep 26, 2026 14:35	Kevin Heavey	CPPclang++20.1.2	Success	1,578+27.99 RP
Sep 26, 2026 14:32	Kevin Heavey	CPPg++14.2.0	Success	1,588
Sep 26, 2026 14:28	Kevin Heavey	CPPg++14.2.0	Success	1,585+74.73 RP
Sep 26, 2026 14:22	Kevin Heavey	CPPg++14.2.0	Success	1,604+151.69 RP
Sep 26, 2026 14:11	Kevin Heavey	CPPg++14.2.0	Success	1,644+148.01 RP
Sep 26, 2026 14:03	Kevin Heavey	CPPg++14.2.0	Success	1,685+5'934.72 RP
Sep 23, 2026 18:19	Matthias Görgens	CPPclang++19.1.1	Success	6,797+1'471.24 RP
Sep 21, 2026 17:50	Andrew Epstein	GOgo1.26.2	Success	1,576+130.29 RP
Sep 21, 2026 17:49	Andrew Epstein	CSHARP9.0.15	Success	1,579+125.80 RP
Sep 21, 2026 17:48	Andrew Epstein	ZIG0.15.1	Success	1,587+74.55 RP
Sep 21, 2026 17:47	Andrew Epstein	RUSTrust-1.95.0	Success	1,577+110.62 RP
Sep 21, 2026 17:42	Andrew Epstein	GOgo1.26.2	Success	1,608+7.73 RP
Sep 21, 2026 17:31	Andrew Epstein	CPPg++14.2.0	Success	1,577+56.00 RP
Sep 21, 2026 17:28	Andrew Epstein	CPPg++14.2.0	Success	12,806
Sep 21, 2026 17:27	Andrew Epstein	CPPg++14.2.0	Success	6,437
Sep 21, 2026 17:25	Andrew Epstein	CPPg++14.2.0	Success	1,587+3.97 RP
Sep 21, 2026 17:23	Andrew Epstein	CPPg++14.2.0	Success	1,588+7.92 RP
Sep 21, 2026 17:22	Andrew Epstein	CPPg++14.2.0	Success	1,590+11.84 RP
Sep 21, 2026 17:20	Andrew Epstein	CPPg++14.2.0	Success	9,695
Sep 21, 2026 17:18	Andrew Epstein	CPPg++14.2.0	Success	9,685
Sep 21, 2026 17:15	Andrew Epstein	CPPg++14.2.0	Success	19,332
Sep 21, 2026 17:09	Andrew Epstein	CPPg++14.2.0	Success	1,593+7.87 RP
Sep 21, 2026 17:08	Andrew Epstein	CPPg++14.2.0	Success	1,595+62.27 RP
Sep 21, 2026 17:06	Andrew Epstein	CPPg++14.2.0	Success	6,643

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