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.

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Bernard TeoScore: 71,858Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Sep 22, 2022 12:12	71,369	376,895,269	347,711,000	1,998,000	2,281,472
2	Sep 22, 2022 12:12	71,371	374,998,971	347,718,000	1,998,000	2,281,472
3	Sep 22, 2022 12:12	71,384	377,507,824	348,781,000	999,000	2,281,472
4	Sep 22, 2022 12:20	71,398	377,395,942	348,849,000	999,000	2,396,160
5	Sep 22, 2022 12:20	71,400	376,554,808	348,859,000	999,000	2,281,472
6	Sep 22, 2022 12:12	71,404	374,798,573	348,882,000	999,000	2,273,280
7	Sep 22, 2022 12:20	71,423	375,397,494	348,975,000	999,000	2,400,256
8	Sep 22, 2022 12:12	71,435	372,724,160	349,030,000	1,000,000	2,281,472
9	Sep 22, 2022 12:12	71,437	375,593,872	348,041,000	2,000,000	2,281,472
10	Sep 22, 2022 12:12	71,443	378,683,624	349,072,000	1,000,000	2,400,256
11	Sep 22, 2022 12:12	71,447	374,741,676	348,090,000	2,000,000	2,281,472
12	Sep 22, 2022 12:12	71,457	381,736,217	349,137,000	1,000,000	2,396,160
13	Sep 22, 2022 12:20	71,476	376,237,267	350,231,000	0	2,281,472
14	Sep 22, 2022 12:12	71,486	377,136,532	349,280,000	1,000,000	2,281,472
15	Sep 22, 2022 12:12	71,486	378,648,349	350,282,000	0	2,408,448
16	Sep 22, 2022 12:12	71,493	374,617,175	350,317,000	0	2,404,352
17	Sep 22, 2022 12:20	71,501	376,393,659	348,360,000	1,996,000	2,281,472
18	Sep 22, 2022 12:12	71,819	375,533,333	349,915,000	1,999,000	2,400,256
19	Sep 22, 2022 12:12	71,858	376,701,876	350,106,000	2,000,000	2,281,472
20	Sep 22, 2022 12:12	71,907	378,693,940	352,342,000	0	2,400,256
21	Sep 22, 2022 12:20	71,963	377,708,924	350,621,000	1,997,000	2,400,256
22	Sep 22, 2022 12:12	73,202	427,094,122	358,688,495	0	2,269,184
23	Sep 22, 2022 12:12	73,212	429,725,455	358,740,756	0	2,260,992
24	Sep 22, 2022 12:20	73,223	435,114,933	358,794,060	0	2,273,280
25	Sep 22, 2022 12:12	73,236	442,847,198	358,854,704	0	2,265,088
26	Sep 22, 2022 12:20	73,239	431,714,256	358,873,068	0	2,256,896
27	Sep 22, 2022 12:12	73,241	424,291,342	358,882,004	0	2,269,184
28	Sep 22, 2022 12:20	73,272	424,382,697	359,035,056	0	2,277,376
29	Sep 22, 2022 12:12	73,949	384,902,921	361,350,000	1,000,000	2,404,352
30	Sep 22, 2022 12:12	73,960	389,549,887	362,405,000	0	2,400,256
31	Sep 22, 2022 12:12	73,966	384,727,256	362,434,000	0	2,396,160
32	Sep 22, 2022 12:20	74,119	394,114,673	361,188,000	1,995,000	2,281,472
33	Sep 22, 2022 12:20	74,187	387,208,938	362,516,000	1,001,000	2,281,472
34	Sep 22, 2022 12:20	74,203	390,706,822	362,598,000	998,000	2,392,064
35	Sep 22, 2022 12:12	75,577	445,173,598	370,324,930	0	2,265,088
36	Sep 22, 2022 12:12	75,578	425,169,905	370,331,708	0	2,252,800

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