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 4, 2026 19:45	Daniel	RUSTrust-1.93.1	Success	5,592
Mar 4, 2026 19:44	olliecrow	CPPg++13.3.0	Success	3,870
Mar 4, 2026 19:40	olliecrow	CPPg++13.3.0	Success	3,870
Mar 4, 2026 19:36	olliecrow	CPPg++13.3.0	Success	3,898
Mar 4, 2026 19:32	olliecrow	CPPg++13.3.0	Success	3,870
Mar 4, 2026 19:28	olliecrow	CPPg++13.3.0	Success	3,870+9.31 RP
Mar 4, 2026 19:24	olliecrow	CPPg++13.3.0	Success	3,884+3.97 RP
Mar 4, 2026 19:19	olliecrow	CPPg++13.3.0	Success	3,890+1'537.42 RP
Mar 4, 2026 19:15	olliecrow	CPPg++13.3.0	Success	9,678+2.45 RP
Mar 4, 2026 19:11	olliecrow	CPPg++13.3.0	Success	9,792
Mar 4, 2026 19:07	olliecrow	CPPclang++18.1.3	Success	18,604
Mar 4, 2026 19:04	olliecrow	CPPg++13.3.0	Success	10,533
Mar 4, 2026 18:59	olliecrow	CPPg++13.3.0	Success	9,701+197.42 RP
Mar 4, 2026 18:55	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 18:51	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 18:47	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 18:42	olliecrow	CPPg++13.3.0	Success	19,315
Mar 4, 2026 18:35	olliecrow	CPPg++13.3.0	Success	15,556
Mar 4, 2026 18:32	olliecrow	CPPg++13.3.0	Success	11,999+62.21 RP
Mar 4, 2026 18:29	olliecrow	CPPg++13.3.0	Success	17,638
Mar 4, 2026 18:26	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 18:22	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 18:19	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 18:16	olliecrow	CPPg++13.3.0	Error
Mar 4, 2026 18:13	olliecrow	CPPg++13.3.0	Success	16,543
Mar 4, 2026 18:10	olliecrow	CPPclang++18.1.3	Success	12,967+99.33 RP
Mar 4, 2026 18:06	olliecrow	CPPg++13.3.0	Success	14,884+671.86 RP
Mar 4, 2026 18:03	olliecrow	CPPg++13.3.0	Error
Feb 17, 2026 00:58	Valentin Kofman	CPPg++13.3.0	Success	4,549
Feb 17, 2026 00:13	Valentin Kofman	CPPg++13.3.0	Error
Feb 17, 2026 00:12	Valentin Kofman	CPPg++13.3.0	Error
Feb 17, 2026 00:11	Valentin Kofman	CPPg++13.3.0	Success	3,793+39.03 RP
Feb 17, 2026 00:10	Valentin Kofman	CPPg++13.3.0	Error
Feb 16, 2026 23:15	Valentin Kofman	CPPclang++18.1.3	Success	3,861
Feb 16, 2026 23:13	Valentin Kofman	CPPg++13.3.0	Success	3,851
Feb 16, 2026 23:12	Valentin Kofman	CPPg++13.3.0	Success	4,042
Feb 16, 2026 23:06	Valentin Kofman	CPPg++13.3.0	Success	3,874
Feb 16, 2026 23:05	Valentin Kofman	CPPg++13.3.0	Success	3,857
Feb 16, 2026 23:03	Valentin Kofman	CPPg++13.3.0	Success	3,850+11.42 RP
Feb 16, 2026 23:02	Valentin Kofman	CPPclang++18.1.3	Success	3,934
Feb 16, 2026 18:30	Valentin Kofman	CPPclang++18.1.3	Success	3,896
Feb 16, 2026 18:27	Valentin Kofman	CPPclang++18.1.3	Success	3,934
Feb 16, 2026 18:26	Valentin Kofman	CPPclang++18.1.3	Success	3,971
Feb 16, 2026 18:24	Valentin Kofman	CPPclang++18.1.3	Success	3,887
Feb 16, 2026 18:22	Valentin Kofman	CPPclang++18.1.3	Success	3,867+2.67 RP
Feb 16, 2026 18:22	Valentin Kofman	CPPclang++18.1.3	Success	3,900
Feb 16, 2026 18:20	Valentin Kofman	CPPclang++18.1.3	Success	3,871+19.21 RP
Feb 16, 2026 18:19	Valentin Kofman	CPPclang++18.1.3	Success	3,900+176.33 RP
Feb 16, 2026 18:14	Valentin Kofman	CPPclang++18.1.3	Success	4,188+7.39 RP
Feb 16, 2026 18:09	Valentin Kofman	CPPclang++18.1.3	Success	7,556
Feb 16, 2026 18:06	Valentin Kofman	CPPclang++18.1.3	Success	4,201+25.78 RP
Feb 16, 2026 18:01	Valentin Kofman	CPPclang++18.1.3	Success	4,876
Feb 16, 2026 17:58	Valentin Kofman	CPPclang++18.1.3	Success	4,842
Feb 16, 2026 17:55	Valentin Kofman	CPPclang++18.1.3	Success	7,061
Feb 16, 2026 16:54	Valentin Kofman	CPPclang++18.1.3	Success	4,247+1'556.26 RP
Feb 16, 2026 16:47	Valentin Kofman	CPPclang++18.1.3	Success	12,526+629.45 RP
Feb 16, 2026 16:37	Valentin Kofman	CPPclang++18.1.3	Success	59,211+168.89 RP
Jan 8, 2026 22:00	99991	CPPclang++18.1.3	Success	3,978
Jan 8, 2026 20:24	99991	CPPclang++18.1.3	Success	3,726+18.60 RP
Jan 8, 2026 19:59	99991	CPPclang++18.1.3	Success	3,752+757.94 RP
Jan 8, 2026 19:25	99991	CPPg++13.3.0	Success	5,827
Jan 8, 2026 19:18	99991	CPPg++13.3.0	Success	14,451
Jan 8, 2026 19:16	99991	CPPclang++18.1.3	Success	5,243+1'907.30 RP
Jan 5, 2026 16:34	Josu San Martin	GOgo1.25.5	Success	3,306+2'196.44 RP
Jan 5, 2026 06:20	Josu San Martin	GOgo1.25.5	Success	23,592
Jan 5, 2026 05:51	Josu San Martin	RUSTrust-1.92.0	Success	2,922+325.72 RP
Jan 5, 2026 05:32	Josu San Martin	CPPg++13.3.0	Success	3,296
Jan 5, 2026 05:32	Josu San Martin	RUSTrust-1.92.0	Success	3,121
Jan 5, 2026 05:24	Josu San Martin	CPPg++13.3.0	Success	3,360
Jan 5, 2026 05:12	Josu San Martin	RUSTrust-1.92.0	Success	3,068+173.72 RP
Jan 5, 2026 04:36	Josu San Martin	CPPg++13.3.0	Success	3,213
Jan 5, 2026 04:31	Josu San Martin	RUSTrust-1.92.0	Success	3,152+2.02 RP
Jan 5, 2026 04:29	Josu San Martin	RUSTrust-1.92.0	Success	3,234
Jan 5, 2026 04:29	Josu San Martin	RUSTrust-1.92.0	Success	3,153+232.56 RP
Jan 5, 2026 03:56	Josu San Martin	RUSTrust-1.92.0	Success	3,316
Jan 5, 2026 03:56	Josu San Martin	RUSTrust-1.92.0	Success	3,300
Jan 5, 2026 03:55	Josu San Martin	RUSTrust-1.92.0	Success	3,273+9.32 RP
Jan 5, 2026 03:11	Josu San Martin	CPPg++13.3.0	Success	3,348
Jan 5, 2026 02:52	Josu San Martin	RUSTrust-1.92.0	Success	3,278+120.42 RP
Jan 5, 2026 02:30	Josu San Martin	CPPg++13.3.0	Success	3,487
Jan 5, 2026 02:14	Josu San Martin	RUSTrust-1.92.0	Success	3,344+292.58 RP
Jan 4, 2026 18:19	Josu San Martin	CPPg++13.3.0	Success	3,533
Jan 4, 2026 18:19	Josu San Martin	CPPg++13.3.0	Success	3,534
Jan 4, 2026 18:16	Josu San Martin	RUSTrust-1.92.0	Success	3,516+741.46 RP
Jan 1, 2026 01:12	Josu San Martin	CPPg++13.3.0	Success	4,127
Jan 1, 2026 01:03	Josu San Martin	CPPg++13.3.0	Success	4,710
Jan 1, 2026 00:52	Josu San Martin	GOgo1.25.5	Success	34,961
Jan 1, 2026 00:50	Josu San Martin	RUSTrust-1.92.0	Success	13,456
Jan 1, 2026 00:44	Josu San Martin	GOgo1.25.5	Success	34,452
Jan 1, 2026 00:35	Josu San Martin	RUSTrust-1.92.0	Success	4,043+643.01 RP
Jan 1, 2026 00:26	Josu San Martin	CPPg++13.3.0	Success	4,047+1'704.04 RP
Jan 1, 2026 00:08	Josu San Martin	RUSTrust-1.92.0	Success	13,439
Dec 31, 2025 23:58	Josu San Martin	RUSTrust-1.92.0	Success	13,039+22.44 RP
Dec 31, 2025 23:57	Josu San Martin	CPPg++13.3.0	Success	13,437
Dec 31, 2025 23:57	Josu San Martin	CPPg++13.3.0	Success	13,432+222.84 RP
Dec 31, 2025 23:50	Josu San Martin	CPPg++13.3.0	Success	19,170+521.65 RP
Dec 31, 2025 15:59	Aniruddha Deb	CPPclang++18.1.3	Success	3,999
Dec 31, 2025 15:50	Aniruddha Deb	CPPclang++18.1.3	Success	4,094
Dec 31, 2025 15:46	Aniruddha Deb	CPPclang++18.1.3	Success	4,161
Dec 31, 2025 15:45	Aniruddha Deb	CPPg++13.3.0	Success	4,102

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