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 listJan 5, 2026 05:51

Josu San MartinScore: 2,922Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 21, 2026 05:25	2,808	446,541,353	406,261,000	15,009,000	16,998,400
2	Mar 21, 2026 05:25	2,808	447,835,606	405,280,000	15,971,000	16,986,112
3	Mar 21, 2026 05:29	2,810	449,035,460	409,556,000	11,987,000	16,965,632
4	Mar 21, 2026 05:29	2,810	450,408,980	405,512,000	15,980,000	16,986,112
5	Mar 21, 2026 05:25	2,811	450,643,640	406,722,000	14,989,000	16,977,920
6	Mar 21, 2026 05:29	2,811	453,630,144	408,648,000	12,988,000	16,990,208
7	Mar 21, 2026 05:29	2,811	448,619,985	404,633,000	16,984,000	16,977,920
8	Mar 21, 2026 05:29	2,813	450,755,644	404,929,000	16,997,000	16,998,400
9	Mar 21, 2026 05:25	2,814	445,386,585	407,063,000	15,002,000	16,973,824
10	Mar 21, 2026 05:25	2,817	446,700,562	406,624,000	15,985,000	16,998,400
11	Mar 21, 2026 05:29	2,818	448,966,912	407,726,000	14,989,000	16,990,208
12	Mar 21, 2026 05:29	2,819	449,626,549	409,925,000	12,997,000	16,986,112
13	Mar 21, 2026 05:25	2,819	452,489,226	408,800,000	13,993,000	16,990,208
14	Mar 21, 2026 05:29	2,820	445,946,977	408,951,000	13,998,000	16,986,112
15	Mar 21, 2026 05:25	2,820	448,203,417	406,977,000	15,999,000	16,977,920
16	Mar 21, 2026 05:29	2,823	451,841,087	407,473,000	15,979,000	17,096,704
17	Mar 21, 2026 05:25	2,835	452,994,547	408,294,000	16,970,000	16,977,920
18	Mar 21, 2026 05:25	2,847	447,720,179	413,015,000	14,000,000	16,977,920
19	Jan 5, 2026 05:53	2,912	466,780,469	422,838,000	13,994,000	16,973,824
20	Jan 5, 2026 05:53	2,912	464,129,984	421,836,000	14,994,000	17,092,608
21	Jan 5, 2026 05:53	2,916	463,402,110	420,410,000	16,976,000	17,092,608
22	Jan 5, 2026 05:53	2,922	465,245,194	423,306,000	15,010,000	16,982,016
23	Jan 5, 2026 05:53	2,926	466,356,727	421,800,000	17,032,000	16,973,824
24	Jan 5, 2026 05:53	2,929	469,259,380	424,404,000	14,978,000	16,973,824
25	Jan 5, 2026 05:53	2,930	466,805,195	425,469,000	13,982,000	16,986,112
26	Jan 5, 2026 05:53	2,932	467,374,805	421,865,000	17,994,000	16,990,208
27	Jan 5, 2026 05:56	2,936	467,360,541	427,486,000	12,984,000	17,092,608
28	Jan 5, 2026 05:51	2,944	468,027,104	425,591,000	15,984,000	16,969,728
29	Jan 5, 2026 05:55	2,945	476,350,679	424,759,000	16,990,000	16,973,824
30	Jan 5, 2026 05:55	2,956	469,171,127	427,460,000	15,979,000	16,973,824
31	Jan 5, 2026 05:53	2,956	474,183,538	426,361,000	17,014,000	16,973,824
32	Jan 5, 2026 05:56	2,958	470,785,008	424,674,000	18,985,000	16,977,920
33	Jan 5, 2026 05:51	2,960	471,122,102	428,069,000	16,002,000	16,977,920
34	Jan 5, 2026 05:51	2,961	472,205,916	426,196,000	18,008,000	16,977,920
35	Jan 5, 2026 05:51	2,964	467,751,070	426,663,000	17,985,000	17,092,608
36	Jan 5, 2026 05:55	2,966	474,471,806	428,931,000	15,997,000	16,982,016
37	Jan 5, 2026 05:51	2,966	468,882,152	427,975,000	16,999,000	16,977,920
38	Jan 5, 2026 05:51	2,973	472,822,328	425,932,000	19,949,000	17,022,976
39	Jan 5, 2026 05:56	2,983	474,508,415	432,476,000	14,981,000	17,092,608
40	Jan 5, 2026 05:51	2,983	478,960,400	431,456,000	15,979,000	16,969,728
41	Jan 5, 2026 05:51	3,001	473,313,694	434,086,000	16,003,000	16,973,824
42	Jan 5, 2026 05:51	3,024	476,041,672	434,577,000	18,981,000	16,977,920

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