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 listApr 20, 2025 08:18

Aniruddha DebScore: 15,535Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Apr 20, 2025 08:16	15,360	62,117,227	32,338,000	6,063,000	2,322,432
2	Apr 19, 2025 16:44	15,361	62,164,650	32,340,000	6,063,000	2,535,424
3	Apr 19, 2025 16:44	15,412	63,599,243	32,446,000	6,083,000	2,523,136
4	Apr 20, 2025 08:16	15,412	67,947,441	32,446,000	6,083,000	2,523,136
5	Apr 20, 2025 08:16	15,413	62,109,459	29,406,000	9,126,000	2,277,376
6	Apr 19, 2025 16:44	15,416	69,589,386	31,441,000	7,099,000	2,285,568
7	Apr 20, 2025 08:16	15,418	62,766,130	31,446,000	7,100,000	2,506,752
8	Apr 19, 2025 16:44	15,428	63,903,164	32,480,000	6,090,000	2,449,408
9	Apr 20, 2025 08:16	15,438	65,038,501	30,471,000	8,125,000	2,273,280
10	Apr 20, 2025 08:16	15,444	71,138,807	31,497,000	7,112,000	2,457,600
11	Apr 20, 2025 08:16	15,446	65,672,499	32,517,000	6,097,000	2,269,184
12	Apr 20, 2025 08:17	15,451	66,428,232	29,479,000	9,148,000	2,424,832
13	Apr 20, 2025 08:17	15,456	67,625,968	33,557,000	5,084,000	2,277,376
14	Apr 20, 2025 08:16	15,462	66,362,365	31,535,000	7,121,000	2,469,888
15	Apr 20, 2025 08:17	15,467	66,459,657	34,597,000	4,070,000	2,506,752
16	Apr 20, 2025 08:16	15,473	62,705,573	29,521,000	9,161,000	2,424,832
17	Apr 20, 2025 08:16	15,479	65,317,366	33,606,000	5,091,000	2,490,368
18	Apr 19, 2025 16:44	15,484	64,739,911	29,543,000	9,168,000	2,531,328
19	Apr 20, 2025 08:17	15,535	66,132,257	30,871,000	7,966,000	2,445,312
20	Apr 20, 2025 08:17	15,545	60,062,403	31,888,000	6,975,000	2,527,232
21	Apr 20, 2025 08:16	15,545	59,200,578	28,898,000	9,964,000	2,478,080
22	Apr 19, 2025 16:44	15,547	63,104,100	29,899,000	8,969,000	2,531,328
23	Apr 20, 2025 08:17	15,550	67,251,537	30,902,000	7,974,000	2,383,872
24	Apr 20, 2025 08:17	15,562	64,445,454	28,929,000	9,975,000	2,535,424
25	Apr 19, 2025 16:44	15,565	62,157,499	31,929,000	6,984,000	2,510,848
26	Apr 20, 2025 08:18	15,610	64,273,922	33,021,000	6,003,000	2,535,424
27	Apr 20, 2025 08:16	15,611	66,479,762	31,022,000	8,005,000	2,359,296
28	Apr 20, 2025 08:16	15,618	62,132,079	31,035,000	8,009,000	2,277,376
29	Apr 20, 2025 08:18	15,637	62,833,550	30,071,000	9,021,000	2,527,232
30	Apr 19, 2025 16:44	15,654	64,804,001	33,115,000	6,021,000	2,273,280
31	Apr 20, 2025 08:16	15,695	71,161,305	31,189,000	8,048,000	2,359,296
32	Apr 20, 2025 08:16	15,704	63,849,958	31,207,000	8,053,000	2,347,008
33	Apr 20, 2025 08:17	15,796	64,937,687	32,403,000	7,088,000	2,277,376
34	Apr 20, 2025 08:17	15,852	68,804,881	30,486,000	9,145,000	2,330,624
35	Apr 20, 2025 08:18	16,988	66,328,490	33,369,000	9,100,000	2,506,752
36	Apr 19, 2025 16:44	17,297	70,857,717	36,204,000	7,039,000	2,523,136

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