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.

Back to listMar 15, 2026 10:08

Dominique GarmierScore: 4,989Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 15, 2026 10:05	4,846	755,197,704	699,982,000	26,960,000	17,162,240
2	Mar 15, 2026 10:05	4,866	751,174,479	699,933,000	29,954,000	17,039,360
3	Mar 15, 2026 10:41	4,962	770,979,321	712,337,000	31,925,000	17,149,952
4	Mar 15, 2026 10:39	4,971	777,157,964	713,641,000	31,939,000	17,125,376
5	Mar 15, 2026 10:39	4,974	773,567,803	717,101,000	28,963,000	17,043,456
6	Mar 15, 2026 10:00	4,976	780,229,264	719,429,000	26,941,000	17,047,552
7	Mar 15, 2026 11:01	4,978	778,190,970	718,753,000	27,951,000	17,039,360
8	Mar 15, 2026 10:12	4,978	775,661,218	719,769,000	26,953,000	16,969,728
9	Mar 15, 2026 10:00	4,979	771,743,595	715,959,000	30,954,000	17,047,552
10	Mar 15, 2026 11:01	4,983	777,262,999	715,549,000	31,935,000	17,043,456
11	Mar 15, 2026 10:12	4,983	779,871,437	716,474,000	30,934,000	17,088,512
12	Mar 15, 2026 10:12	4,983	776,621,527	720,537,000	26,945,000	16,957,440
13	Mar 15, 2026 11:01	4,984	781,101,889	713,638,000	33,935,000	17,190,912
14	Mar 15, 2026 10:39	4,987	778,586,146	717,021,000	30,957,000	16,957,440
15	Mar 15, 2026 10:00	4,988	782,889,709	723,216,000	24,972,000	17,084,416
16	Mar 15, 2026 10:39	4,989	781,985,457	718,464,000	29,936,000	17,145,856
17	Mar 15, 2026 10:00	4,990	778,812,850	716,538,000	31,934,000	16,969,728
18	Mar 15, 2026 10:08	4,998	779,065,819	714,731,000	34,938,000	17,190,912
19	Mar 15, 2026 10:41	4,998	782,775,607	719,807,000	29,950,000	16,957,440
20	Mar 15, 2026 10:00	4,999	781,372,291	721,878,000	27,956,000	17,055,744
21	Mar 15, 2026 10:39	5,000	782,726,015	720,076,000	29,961,000	17,186,816
22	Mar 15, 2026 10:05	5,000	779,155,675	726,038,000	23,968,000	16,957,440
23	Mar 15, 2026 10:39	5,001	777,892,905	721,213,000	28,968,000	16,969,728
24	Mar 15, 2026 10:00	5,002	781,673,094	720,303,000	29,971,000	17,051,648
25	Mar 15, 2026 10:00	5,005	781,089,080	715,753,000	34,939,000	17,039,360
26	Mar 15, 2026 10:41	5,005	784,895,743	718,764,000	31,945,000	17,096,704
27	Mar 15, 2026 10:08	5,005	785,193,689	723,792,000	26,955,000	17,027,072
28	Mar 15, 2026 10:00	5,007	776,604,555	720,097,000	30,961,000	16,961,536
29	Mar 15, 2026 10:08	5,008	781,014,271	722,282,000	28,971,000	17,076,224
30	Mar 15, 2026 10:00	5,039	784,378,565	727,894,000	27,957,000	16,949,248

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