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.

Back to listJul 12, 2023 22:14

Yuriy LyfenkoScore: 62,120Success

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Challenge History

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Jul 12, 2023 22:13	61,782	180,241,515	146,431,000	8,023,000	2,273,280
2	Jul 12, 2023 22:14	61,912	180,641,094	146,793,000	7,988,000	2,514,944
3	Jul 12, 2023 22:11	61,919	179,142,241	148,806,000	5,992,000	2,314,240
4	Jul 12, 2023 22:13	61,920	184,606,395	148,808,000	5,992,000	2,449,408
5	Jul 12, 2023 22:11	61,944	186,515,648	143,869,000	10,990,000	2,322,432
6	Jul 12, 2023 22:14	61,946	184,395,652	141,877,000	12,988,000	2,363,392
7	Jul 12, 2023 22:11	61,954	186,509,159	146,890,000	7,994,000	2,314,240
8	Jul 12, 2023 22:11	61,968	221,215,435	154,919,831	0	2,293,760
9	Jul 12, 2023 22:13	61,981	180,053,875	144,956,000	9,996,000	2,306,048
10	Jul 12, 2023 22:13	61,992	179,368,435	143,982,000	10,998,000	2,355,200
11	Jul 12, 2023 22:13	62,010	184,214,015	146,025,000	9,001,000	2,469,888
12	Jul 12, 2023 22:11	62,042	179,394,493	140,094,000	15,010,000	2,318,336
13	Jul 12, 2023 22:11	62,049	181,181,869	146,116,000	9,007,000	2,412,544
14	Jul 12, 2023 22:13	62,054	236,251,723	155,134,052	0	2,285,568
15	Jul 12, 2023 22:13	62,061	179,405,858	145,143,000	10,009,000	2,494,464
16	Jul 12, 2023 22:13	62,086	182,151,579	144,201,000	11,015,000	2,469,888
17	Jul 12, 2023 22:14	62,099	212,456,100	155,246,308	0	2,285,568
18	Jul 12, 2023 22:14	62,100	182,295,983	150,242,000	5,008,000	2,433,024
19	Jul 12, 2023 22:14	62,120	221,015,430	155,300,852	0	2,297,856
20	Jul 12, 2023 22:14	62,122	188,947,607	149,294,000	6,011,000	2,465,792
21	Jul 12, 2023 22:13	62,124	188,984,940	144,288,000	11,022,000	2,306,048
22	Jul 12, 2023 22:14	62,154	222,504,718	155,384,201	0	2,306,048
23	Jul 12, 2023 22:11	62,170	179,584,365	144,395,000	11,030,000	2,301,952
24	Jul 12, 2023 22:11	62,189	216,348,533	155,472,379	0	2,293,760
25	Jul 12, 2023 22:14	62,196	185,325,409	147,466,000	8,025,000	2,273,280
26	Jul 12, 2023 22:13	62,199	183,145,503	145,466,000	10,032,000	2,281,472
27	Jul 12, 2023 22:11	62,214	178,471,279	147,507,000	8,027,000	2,383,872
28	Jul 12, 2023 22:14	62,254	184,443,832	146,598,000	9,036,000	2,314,240
29	Jul 12, 2023 22:14	62,313	193,076,495	146,795,000	8,987,000	2,310,144
30	Jul 12, 2023 22:11	62,321	183,407,047	143,819,000	11,984,000	2,314,240
31	Jul 12, 2023 22:14	62,322	182,567,916	146,818,000	8,988,000	2,322,432
32	Jul 12, 2023 22:11	62,342	181,104,860	143,867,000	11,988,000	2,318,336
33	Jul 12, 2023 22:14	62,354	182,965,509	145,892,000	9,992,000	2,494,464
34	Jul 12, 2023 22:13	62,375	212,471,264	155,937,658	0	2,285,568
35	Jul 12, 2023 22:11	62,414	214,499,686	156,035,006	0	2,297,856
36	Jul 12, 2023 22:13	62,422	218,537,522	156,056,005	0	2,289,664

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