Format integers

Compute a checksum over the decimal representations of binary integers as fast as possible.

Input: 250 000 000 uint32 values in little-endian binary on STDIN (4 bytes each).

Output: A uint64 checksum computed as:

CRC = sum of number_crc(n) for each n

where number_crc(n) converts n to its decimal string and sums ascii(digit) * position over each digit (0-indexed from the left).

Example: For n = 42, the decimal string is "42", so number_crc(42) = ascii('4') * 0 + ascii('2') * 1 = 52 * 0 + 50 * 1 = 50.

Restrictions:60s256Mb 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 21, 2022 15:07

Robert BurkeScore: 81,640Success

Source Code

Source code access is restricted. Log in to request access.

Challenge History

No challenges yet.

Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Jul 21, 2022 15:07	78,016	439,938,048	382,277,832	0	2,289,664
2	Jul 21, 2022 15:07	78,037	449,635,117	382,382,044	0	2,289,664
3	Jul 21, 2022 15:07	78,038	434,725,004	382,388,278	0	2,281,472
4	Jul 21, 2022 15:06	78,047	449,552,199	382,427,852	0	2,289,664
5	Jul 21, 2022 15:07	78,051	431,156,556	382,448,271	0	2,289,664
6	Jul 21, 2022 15:06	78,066	436,956,942	382,521,639	0	2,289,664
7	Jul 21, 2022 15:07	78,088	442,564,343	382,633,034	0	2,293,760
8	Jul 21, 2022 15:06	78,126	442,242,269	382,817,562	0	2,293,760
9	Jul 21, 2022 15:07	78,131	449,193,112	382,841,134	0	2,289,664
10	Jul 21, 2022 15:07	81,590	425,215,528	398,792,000	999,000	2,281,472
11	Jul 21, 2022 15:06	81,593	424,238,394	397,809,000	1,999,000	2,514,944
12	Jul 21, 2022 15:06	81,618	420,076,932	397,930,000	1,999,000	2,281,472
13	Jul 21, 2022 15:07	81,621	422,803,535	398,943,000	999,000	2,281,472
14	Jul 21, 2022 15:07	81,624	423,286,955	398,958,000	999,000	2,281,472
15	Jul 21, 2022 15:06	81,624	428,602,480	397,959,000	1,999,000	2,281,472
16	Jul 21, 2022 15:07	81,629	422,686,099	398,981,000	999,000	2,281,472
17	Jul 21, 2022 15:07	81,635	427,195,464	399,012,000	1,000,000	2,281,472
18	Jul 21, 2022 15:07	81,638	423,301,356	398,025,000	2,000,000	2,424,832
19	Jul 21, 2022 15:07	81,640	427,225,276	398,035,000	2,000,000	2,428,928
20	Jul 21, 2022 15:07	81,640	428,652,421	399,038,000	1,000,000	2,281,472
21	Jul 21, 2022 15:07	81,641	422,401,784	399,041,000	1,000,000	2,281,472
22	Jul 21, 2022 15:07	81,643	424,508,370	399,050,000	1,000,000	2,433,024
23	Jul 21, 2022 15:06	81,646	422,520,395	399,067,000	1,000,000	2,428,928
24	Jul 21, 2022 15:07	81,647	422,869,666	400,072,000	0	2,277,376
25	Jul 21, 2022 15:06	81,656	419,561,088	399,113,000	1,000,000	2,519,040
26	Jul 21, 2022 15:06	81,659	422,923,083	400,131,000	0	2,428,928
27	Jul 21, 2022 15:06	81,666	422,296,910	399,165,000	1,000,000	2,420,736
28	Jul 21, 2022 15:07	81,668	426,611,543	400,171,000	0	2,281,472
29	Jul 21, 2022 15:07	81,688	422,678,232	400,269,000	0	2,281,472
30	Jul 21, 2022 15:07	81,698	421,824,005	399,322,000	1,000,000	2,519,040
31	Jul 21, 2022 15:07	81,713	426,761,827	399,397,000	998,000	2,281,472
32	Jul 21, 2022 15:06	81,730	422,502,936	399,479,000	998,000	2,281,472
33	Jul 21, 2022 15:07	81,740	424,481,313	399,526,000	998,000	2,424,832
34	Jul 21, 2022 15:06	81,754	422,957,438	399,595,000	998,000	2,281,472
35	Jul 21, 2022 15:07	81,760	422,989,143	398,625,000	1,998,000	2,437,120
36	Jul 21, 2022 15:07	81,773	428,571,343	399,691,000	999,000	2,281,472

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