Large integer multiplication

Multiply two large unsigned integers as fast as possible.

Input

Exactly 500,000 bytes on STDIN: two unsigned integers encoded back-to-back, each 250,000 bytes, in little-endian byte order.

Output

Write exactly 500,000 bytes to STDOUT containing the product in little-endian byte order.

Restrictions:600s256Mb 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.

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matsuoka-601Score: 3,978Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 29, 2023 14:57	3,677	65,799,355	9,192,071	0	2,236,416
2	Dec 29, 2023 14:56	3,685	48,370,956	9,212,726	0	2,256,896
3	Dec 29, 2023 14:56	3,687	61,002,459	9,217,974	0	2,256,896
4	Dec 29, 2023 14:56	3,689	52,218,962	9,222,419	0	2,256,896
5	Dec 29, 2023 14:57	3,754	59,288,591	9,386,205	0	2,244,608
6	Dec 29, 2023 14:56	3,809	60,781,631	9,522,343	0	2,260,992
7	Jul 30, 2024 13:34	3,858	65,324,182	9,644,747	0	2,252,800
8	Dec 29, 2023 14:57	3,868	64,501,526	9,668,922	0	2,256,896
9	Jul 30, 2024 13:34	3,869	55,247,732	9,671,251	0	2,248,704
10	Dec 29, 2023 14:56	3,878	58,097,223	9,694,963	0	2,244,608
11	Jul 30, 2024 13:34	3,889	59,941,521	9,722,396	0	2,355,200
12	Dec 29, 2023 14:56	3,901	53,995,804	9,752,918	0	2,252,800
13	Dec 29, 2023 14:56	3,956	34,977,182	5,494,000	4,395,000	2,478,080
14	Dec 29, 2023 14:56	3,962	29,762,608	4,952,000	4,952,000	2,519,040
15	Dec 29, 2023 14:56	3,964	29,273,814	7,929,000	1,982,000	2,502,656
16	Dec 29, 2023 14:57	3,967	28,075,627	5,951,000	3,967,000	2,375,680
17	Dec 29, 2023 14:57	3,968	29,410,415	7,937,000	1,984,000	2,510,848
18	Dec 29, 2023 14:56	3,969	25,352,721	4,961,000	4,961,000	2,461,696
19	Dec 29, 2023 14:56	3,970	27,383,864	7,720,000	2,205,000	2,486,272
20	Dec 29, 2023 14:56	3,972	27,557,199	6,952,000	2,979,000	2,301,952
21	Dec 29, 2023 14:57	3,975	27,724,695	5,962,000	3,975,000	2,277,376
22	Jul 30, 2024 13:34	3,976	27,219,214	4,418,000	5,522,000	2,379,776
23	Dec 29, 2023 14:56	3,977	21,533,020	5,965,000	3,977,000	2,510,848
24	Dec 29, 2023 14:57	3,977	31,129,141	4,971,000	4,971,000	2,510,848
25	Dec 29, 2023 14:56	3,978	26,719,226	4,972,000	4,972,000	2,457,600
26	Dec 29, 2023 14:56	3,978	28,664,410	4,972,000	4,972,000	2,506,752
27	Dec 29, 2023 14:57	3,990	27,890,424	4,988,000	4,988,000	2,273,280
28	Jul 30, 2024 13:34	3,990	28,995,735	5,985,000	3,990,000	2,519,040
29	Dec 29, 2023 14:57	3,994	31,502,194	5,991,000	3,994,000	2,293,760
30	Jul 30, 2024 13:34	4,024	25,234,779	7,043,000	3,018,000	2,445,312
31	Dec 29, 2023 14:57	4,037	29,452,075	6,055,000	4,037,000	2,383,872
32	Dec 29, 2023 14:56	4,039	31,580,200	6,059,000	4,039,000	2,514,944
33	Dec 29, 2023 14:56	4,040	28,571,119	6,061,000	4,040,000	2,502,656
34	Dec 29, 2023 14:56	4,041	31,086,440	7,072,000	3,030,000	2,514,944
35	Jul 30, 2024 13:34	4,045	26,297,303	6,068,000	4,045,000	2,510,848
36	Dec 29, 2023 14:56	4,048	30,890,201	6,073,000	4,048,000	2,506,752
37	Jul 30, 2024 13:34	4,054	30,527,836	7,094,000	3,040,000	2,269,184
38	Dec 29, 2023 14:56	4,062	26,516,676	5,077,000	5,077,000	2,310,144
39	Jul 30, 2024 13:34	4,063	27,843,267	5,079,000	5,079,000	2,387,968
40	Dec 29, 2023 14:56	4,093	26,178,517	6,139,000	4,093,000	2,473,984
41	Jul 30, 2024 13:34	4,136	33,693,665	8,272,000	2,068,000	2,514,944
42	Dec 29, 2023 14:56	4,138	31,890,923	5,172,000	5,172,000	2,514,944
43	Dec 29, 2023 14:56	4,148	32,662,762	5,185,000	5,185,000	2,322,432
44	Dec 29, 2023 14:56	4,154	25,401,028	7,270,000	3,115,000	2,494,464
45	Jul 30, 2024 13:34	4,199	31,349,385	6,299,000	4,199,000	2,506,752
46	Dec 29, 2023 14:57	4,239	28,388,639	4,239,000	6,359,000	2,273,280
47	Jul 30, 2024 13:34	4,363	27,321,484	6,941,000	3,966,000	2,510,848
48	Dec 29, 2023 14:57	4,366	34,335,011	4,961,000	5,953,000	2,383,872

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