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.

Date	Author	Language	Status	Score
Dec 24, 2023 20:09	Kenneth Maples	CPPg++9.3.0	Success	302,269
Dec 24, 2023 20:05	Kenneth Maples	CPPg++9.3.0	Success	246,323+0.06 RP
Dec 24, 2023 20:04	Kenneth Maples	CPPg++9.3.0	Success	246,694+0.01 RP
Dec 24, 2023 20:03	Kenneth Maples	CPPg++9.3.0	Success	246,730+0.01 RP
Dec 24, 2023 20:02	Kenneth Maples	CPPg++9.3.0	Success	246,805+0.88 RP
Dec 24, 2023 19:57	Kenneth Maples	CPPg++9.3.0	Success	275,080
Dec 24, 2023 19:55	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 19:55	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 19:50	Kenneth Maples	CPPg++9.3.0	Success	275,025
Dec 24, 2023 19:50	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 19:48	Kenneth Maples	CPPg++9.3.0	Success	252,276+0.49 RP
Dec 24, 2023 19:45	Kenneth Maples	CPPg++9.3.0	Success	255,409+0.01 RP
Dec 24, 2023 19:42	Kenneth Maples	CPPg++9.3.0	Success	291,939
Dec 24, 2023 19:39	Kenneth Maples	CPPg++9.3.0	Success	320,729
Dec 24, 2023 19:38	Kenneth Maples	CPPg++9.3.0	Success	321,045
Dec 24, 2023 19:35	Kenneth Maples	CPPg++9.3.0	Success	425,775
Dec 24, 2023 19:35	Kenneth Maples	CPPg++9.3.0	Success	333,352
Dec 24, 2023 19:34	Kenneth Maples	CPPg++9.3.0	Success	413,598
Dec 24, 2023 19:34	Kenneth Maples	CPPg++9.3.0	Success	340,889
Dec 24, 2023 19:34	Kenneth Maples	CPPg++9.3.0	Success	341,253
Dec 24, 2023 19:33	Kenneth Maples	CPPg++9.3.0	Success	255,443+3.85 RP
Dec 24, 2023 19:31	Kenneth Maples	CPPg++9.3.0	Success	283,337+4.41 RP
Dec 24, 2023 19:30	Kenneth Maples	CPPg++9.3.0	Success	341,303
Dec 24, 2023 19:29	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 19:25	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 19:24	Kenneth Maples	CPPg++9.3.0	Success	341,108
Dec 24, 2023 19:24	Kenneth Maples	CPPg++9.3.0	Success	512,289
Dec 24, 2023 19:23	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 19:22	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 19:20	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 19:18	Kenneth Maples	CPPg++9.3.0	Success	341,157
Dec 24, 2023 19:11	Kenneth Maples	CPPg++9.3.0	Success	341,141
Dec 24, 2023 19:09	Kenneth Maples	CPPg++9.3.0	Success	323,760+7.28 RP
Dec 24, 2023 19:08	Kenneth Maples	CPPg++9.3.0	Success	747,544
Dec 24, 2023 19:08	Kenneth Maples	CPPg++9.3.0	Success	981,873
Dec 24, 2023 19:07	Kenneth Maples	CPPg++9.3.0	Success	981,399
Dec 24, 2023 18:59	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 18:57	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 18:55	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 18:48	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 18:42	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 18:41	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 18:40	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 18:33	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 18:31	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 17:54	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 17:35	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 17:34	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 17:32	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 17:32	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 17:25	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 16:49	Oleg Kovalov	GOgo1.21.5	Success	4,773,455
Dec 24, 2023 16:43	Kenneth Maples	CPPg++9.3.0	Success	423,619
Dec 24, 2023 16:42	Kenneth Maples	CPPg++9.3.0	Success	423,693+7.63 RP
Dec 24, 2023 16:40	Oleg Kovalov	GOgo1.21.5	Success	1,682,856
Dec 24, 2023 16:28	Kenneth Maples	CPPg++9.3.0	Success	626,405
Dec 24, 2023 16:27	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 16:26	Kenneth Maples	CPPg++9.3.0	Error
Dec 24, 2023 16:20	Kenneth Maples	CPPg++9.3.0	Success	626,217+2.13 RP
Dec 21, 2023 10:19	Oleg Kovalov	GOgo1.21.5	Success	1,683,282
Dec 21, 2023 10:12	Oleg Kovalov	GOgo1.21.5	Error
Dec 21, 2023 09:57	Oleg Kovalov	GOgo1.21.5	Error
Dec 21, 2023 09:56	Oleg Kovalov	GOgo1.21.5	Error
Dec 21, 2023 09:29	Oleg Kovalov	CPPg++9.3.0	Success	4,652,422
Dec 21, 2023 09:28	Oleg Kovalov	CPPg++9.3.0	Error
Dec 21, 2023 09:26	Oleg Kovalov	CPPg++9.3.0	Error
Dec 21, 2023 09:23	Oleg Kovalov	GOgo1.21.5	Error
Dec 20, 2023 01:11	Kenneth Maples	CPPg++9.3.0	Success	722,518
Dec 19, 2023 12:39	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:35	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:31	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:27	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:24	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:23	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:22	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:14	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:14	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:13	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:11	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 12:04	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 11:59	Kenneth Maples	CPPg++9.3.0	Success	722,550+0.34 RP
Dec 19, 2023 11:50	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 11:44	Kenneth Maples	CPPg++9.3.0	Success	740,921
Dec 19, 2023 11:37	Kenneth Maples	CPPg++9.3.0	Success	740,487+5.07 RP
Dec 19, 2023 11:36	Kenneth Maples	CPPg++9.3.0	Success	1,186,342
Dec 19, 2023 10:24	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 10:18	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 10:16	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 10:13	Kenneth Maples	CPPg++9.3.0	Error
Dec 19, 2023 10:12	Kenneth Maples	CPPg++9.3.0	Success	1,185,790+0.41 RP
Dec 19, 2023 09:42	Kenneth Maples	CPPg++9.3.0	Success	1,246,708+1.67 RP
Dec 16, 2023 03:38	Kenneth Maples	CPPg++9.3.0	Success	1,574,868+6.35 RP
Dec 15, 2023 21:21	Oleg Kovalov	GOgo1.21.5	Error
Dec 15, 2023 20:59	Oleg Kovalov	CPPg++9.3.0	Success	1,651,882+6.05 RP
Dec 15, 2023 14:46	Oleg Kovalov	GOgo1.21.5	Error
Dec 6, 2023 09:55	Viktor Iarmola	CPPg++9.3.0	Success	2,088,254
Dec 6, 2023 09:52	Viktor Iarmola	CPPg++9.3.0	Error
Dec 6, 2023 09:45	Viktor Iarmola	CPPg++9.3.0	Error
Dec 6, 2023 09:40	Viktor Iarmola	CPPg++9.3.0	Error
Dec 6, 2023 09:36	Viktor Iarmola	CPPg++9.3.0	Success	1,651,950+6.05 RP

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