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	1:20.1.2-0ubuntu1~24.04.3	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	3.0.13-0ubuntu3.11	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.

Date	Author	Language	Status	Score
Nov 27, 2024 00:56	Joad Nacer	CPPclang++18.1.3	Error
Nov 27, 2024 00:55	Joad Nacer	CPPclang++18.1.3	Error
Nov 27, 2024 00:53	Joad Nacer	CPPclang++18.1.3	Error
Nov 27, 2024 00:52	Joad Nacer	CPPclang++18.1.3	Error
Nov 27, 2024 00:51	Joad Nacer	CPPclang++18.1.3	Error
Nov 27, 2024 00:50	Joad Nacer	CPPclang++18.1.3	Error
Nov 24, 2024 22:49	Joad Nacer	CPPclang++10.0.0	Success	1,300,917
Nov 24, 2024 22:48	Joad Nacer	CPPclang++10.0.0	Success	1,300,941
Nov 23, 2024 18:19	E Sequeira	GOgo1.23.3	Success	879,986+5.42 RP
Nov 23, 2024 18:18	E Sequeira	CPPg++13.2.0	Success	311,400+31.52 RP
Nov 23, 2024 18:15	E Sequeira	CPPg++13.2.0	Success	16,750,290+0.60 RP
Nov 23, 2024 18:14	E Sequeira	CPPg++13.2.0	Error
Nov 23, 2024 18:14	E Sequeira	CPPclang++18.1.3	Error
Nov 15, 2024 10:57	Mikhail Shirokov	CPPg++13.2.0	Error
Nov 15, 2024 10:55	Mikhail Shirokov	CPPg++13.2.0	Error
Nov 15, 2024 10:53	Mikhail Shirokov	CPPg++13.2.0	Error
Nov 15, 2024 10:49	Mikhail Shirokov	CPPg++13.2.0	Error
Nov 15, 2024 10:46	Mikhail Shirokov	CPPg++13.2.0	Success	377,260
Nov 15, 2024 10:13	Mikhail Shirokov	CPPg++13.2.0	Success	377,228+11.63 RP
Nov 10, 2024 06:07	SSE4	CPPclang++18.1.3	Success	1,262,221+7.92 RP
Nov 7, 2024 11:44	Haha Expert	CPPclang++18.1.3	Success	1,264,145+7.91 RP
Nov 6, 2024 07:14	Mikhail Shirokov	CPPg++13.2.0	Success	672,010+0.37 RP
Nov 6, 2024 07:13	Mikhail Shirokov	CPPg++13.2.0	Error
Nov 6, 2024 07:04	Mikhail Shirokov	CPPg++13.2.0	Success	689,212+0.24 RP
Nov 6, 2024 07:03	Mikhail Shirokov	CPPclang++18.1.3	Success	700,884+3.64 RP
Oct 18, 2024 15:37	Sybrand Aarnoutse	RUSTrust-1.81.0	Success	1,268,480
Oct 17, 2024 15:13	Sybrand Aarnoutse	RUSTrust-1.81.0	Success	1,268,390
Oct 17, 2024 14:36	Sybrand Aarnoutse	RUSTrust-1.81.0	Success	1,268,569+7.88 RP
Oct 16, 2024 10:28	Huy Duc Le	CPPclang++18.1.3	Success	24,484
Oct 16, 2024 10:27	Huy Duc Le	CPPclang++18.1.3	Success	24,436+1.39 RP
Oct 16, 2024 10:27	Huy Duc Le	CPPclang++18.1.3	Error
Oct 16, 2024 10:26	Huy Duc Le	CPPg++13.2.0	Success	25,006
Oct 16, 2024 10:25	Huy Duc Le	CPPclang++18.1.3	Success	24,519+7.03 RP
Oct 7, 2024 20:58	Joad Nacer	CPPclang++10.0.0	Success	4,224,434
Oct 7, 2024 20:53	Joad Nacer	CPPclang++10.0.0	Success	1,299,626
Oct 7, 2024 20:53	Joad Nacer	CPPclang++10.0.0	Success	1,299,958
Sep 4, 2024 21:26	Casper Belier	CPPclang++18.1.3	Success	1,262,797+7.92 RP
Sep 3, 2024 16:57	AnSa	CPPg++13.2.0	Success	1,137,268+2.42 RP
Aug 31, 2024 22:24	Yuriy Lyfenko	CPPg++13.2.0	Success	54,984+0.47 RP
Aug 31, 2024 22:24	Yuriy Lyfenko	CPPclang++18.1.3	Success	59,138
Aug 31, 2024 08:54	matsuoka-601	CPPclang++18.1.3	Success	3,884+102.64 RP
Aug 31, 2024 08:54	matsuoka-601	CPPg++13.2.0	Success	3,963+19.02 RP
Aug 18, 2024 13:53	Chandrasekaran Akash	CPPg++9.4.0	Success	1,676,509
Aug 18, 2024 13:50	Chandrasekaran Akash	CPPg++9.4.0	Error
Aug 18, 2024 13:48	Chandrasekaran Akash	CPPg++9.4.0	Error
Aug 18, 2024 13:47	Chandrasekaran Akash	CPPg++9.4.0	Error
Aug 18, 2024 13:46	Chandrasekaran Akash	CPPg++9.4.0	Success	1,575,206+6.35 RP
Jul 30, 2024 16:02	Daniel	RUSTrust-1.80.0	Success	1,058,785+1.50 RP
Jul 30, 2024 15:28	Daniel	RUSTrust-1.79.0	Success	1,264,951
Jul 30, 2024 15:28	Daniel	RUSTrust-1.79.0	Success	1,258,269+7.95 RP
Jul 30, 2024 13:34	matsuoka-601	CPPg++9.4.0	Success	3,990
Jul 30, 2024 13:34	matsuoka-601	CPPg++9.4.0	Success	3,978+88.16 RP
Jul 29, 2024 15:42	Jonas Cohen	CPPclang++10.0.0	Success	1,269,853+7.87 RP
Jul 29, 2024 03:44	Nimish Gupta	CPPg++9.4.0	Success	1,652,101+6.05 RP
Jul 28, 2024 13:36	ken	CPPg++9.4.0	Success	1,651,795+6.05 RP
Jul 28, 2024 09:56	Charlie Shepherd	RUSTrust-1.80.0	Success	1,295,071
Jul 28, 2024 09:49	Charlie Shepherd	RUSTrust-1.79.0	Success	1,264,604
Jul 28, 2024 09:49	Charlie Shepherd	RUSTrust-1.79.0	Success	1,257,182+7.95 RP
May 27, 2024 16:13	Joad Nacer	CPPclang++10.0.0	Success	1,187,241+0.01 RP
May 27, 2024 16:12	Joad Nacer	CPPclang++10.0.0	Success	1,188,316
May 27, 2024 16:11	Joad Nacer	CPPclang++10.0.0	Success	1,188,201
May 27, 2024 16:10	Joad Nacer	CPPclang++10.0.0	Error
May 27, 2024 16:09	Joad Nacer	CPPclang++10.0.0	Error
May 27, 2024 09:49	Dmitry Dolgopolov	CPPg++9.4.0	Success	1,651,474+6.06 RP
May 13, 2024 23:46	Drew Garcia	CPPg++9.4.0	Error
May 12, 2024 00:07	richu shaji abraham	CPPg++9.4.0	Success	1,574,497+6.35 RP
May 7, 2024 18:44	Joad Nacer	CPPclang++10.0.0	Success	1,189,528
Apr 29, 2024 22:57	Joad Nacer	CPPclang++10.0.0	Success	1,188,673
Apr 29, 2024 22:56	Joad Nacer	CPPclang++10.0.0	Error
Apr 29, 2024 22:53	Joad Nacer	CPPclang++10.0.0	Error
Apr 29, 2024 22:51	Joad Nacer	CPPclang++10.0.0	Success	1,188,863+8.41 RP
Apr 12, 2024 19:07	Drew Garcia	CPPclang++10.0.0	Error
Apr 12, 2024 18:35	Drew Garcia	CPPclang++10.0.0	Error
Apr 12, 2024 18:35	Drew Garcia	CPPclang++10.0.0	Error
Apr 12, 2024 18:20	Drew Garcia	CPPclang++10.0.0	Error
Mar 6, 2024 09:20	Huy Duc Le	CPPg++9.4.0	Success	24,949+19.81 RP
Mar 6, 2024 09:16	Huy Duc Le	CPPclang++10.0.0	Success	26,246+1.33 RP
Mar 6, 2024 09:13	Huy Duc Le	CPPg++9.4.0	Success	26,338+349.49 RP
Mar 6, 2024 09:13	Huy Duc Le	CPPg++9.4.0	Error
Mar 6, 2024 09:07	Huy Duc Le	CPPg++9.4.0	Error
Mar 6, 2024 09:06	Huy Duc Le	CPPg++9.4.0	Error
Mar 6, 2024 09:06	Huy Duc Le	CPPg++9.4.0	Error
Mar 4, 2024 03:33	Huy Duc Le	CPPg++9.4.0	Error
Feb 24, 2024 03:32	Huy Duc Le	CPPg++9.4.0	Success	331,279+0.10 RP
Feb 23, 2024 16:06	Huy Duc Le	CPPclang++10.0.0	Success	371,129
Feb 23, 2024 16:02	Huy Duc Le	CPPg++9.4.0	Success	332,368+24.03 RP
Feb 23, 2024 15:59	Huy Duc Le	CPPg++9.4.0	Success	4,930,155
Feb 23, 2024 15:57	Huy Duc Le	CPPg++9.4.0	Error
Feb 23, 2024 15:55	Huy Duc Le	CPPg++9.4.0	Error
Feb 23, 2024 15:54	Huy Duc Le	CPPg++9.4.0	Error
Feb 23, 2024 15:48	Huy Duc Le	CPPg++9.4.0	Error
Feb 23, 2024 15:47	Huy Duc Le	CPPg++9.4.0	Error
Feb 23, 2024 10:49	Huy Duc Le	CPPg++9.4.0	Error
Feb 23, 2024 10:44	Huy Duc Le	CPPg++9.4.0	Error
Feb 23, 2024 10:41	Huy Duc Le	CPPg++9.4.0	Error
Feb 23, 2024 10:39	Huy Duc Le	CPPg++9.4.0	Error
Feb 23, 2024 10:36	Huy Duc Le	CPPg++9.4.0	Success	1,651,507+6.06 RP
Feb 23, 2024 10:35	Huy Duc Le	CPPg++9.4.0	Error
Jan 31, 2024 13:58	AnSa	CPPg++9.4.0	Success	1,568,869
Jan 31, 2024 13:50	AnSa	CPPg++9.4.0	Success	1,568,319

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