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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Dominique GarmierScore: 167,374Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 15, 2026 21:41	165,185	837,950,666	808,408,000	999,000	2,461,696
2	Mar 16, 2026 15:05	165,334	834,816,045	809,137,000	1,000,000	2,469,888
3	Mar 15, 2026 21:33	165,514	838,770,225	809,018,000	2,000,000	2,273,280
4	Mar 15, 2026 21:40	165,588	836,408,126	810,380,000	999,000	2,265,088
5	Mar 16, 2026 15:05	165,684	839,839,117	810,854,000	999,000	2,265,088
6	Mar 15, 2026 21:33	165,890	845,118,249	808,862,000	3,999,000	2,465,792
7	Mar 15, 2026 22:57	165,896	838,680,684	811,892,000	999,000	2,473,984
8	Mar 15, 2026 21:41	166,127	842,505,648	814,023,000	0	2,465,792
9	Mar 15, 2026 21:40	166,222	844,509,911	813,491,000	999,000	2,273,280
10	Mar 15, 2026 21:41	166,389	847,374,150	813,308,000	1,998,000	2,465,792
11	Mar 14, 2026 15:10	166,467	844,729,098	809,691,000	5,997,000	249,856
12	Mar 15, 2026 21:41	166,506	840,431,443	814,882,000	999,000	2,469,888
13	Mar 15, 2026 21:33	166,551	848,846,362	812,106,000	3,995,000	2,465,792
14	Mar 16, 2026 15:05	166,673	844,615,842	814,700,000	1,999,000	2,265,088
15	Mar 16, 2026 15:05	166,774	843,601,716	817,192,000	0	2,273,280
16	Mar 15, 2026 23:32	166,827	841,864,604	815,455,000	1,998,000	2,273,280
17	Mar 15, 2026 21:41	166,967	844,750,010	818,140,000	0	2,273,280
18	Mar 15, 2026 21:41	167,022	847,781,896	817,409,000	999,000	2,269,184
19	Mar 14, 2026 15:10	167,084	849,647,820	810,714,000	7,997,000	319,488
20	Mar 15, 2026 21:33	167,320	850,061,641	818,867,000	999,000	2,322,432
21	Mar 16, 2026 15:05	167,322	847,156,595	817,877,000	1,999,000	2,265,088
22	Mar 15, 2026 21:41	167,323	845,812,294	818,885,000	999,000	2,465,792
23	Mar 15, 2026 21:33	167,374	846,489,796	818,136,000	1,997,000	2,265,088
24	Mar 15, 2026 21:33	167,397	844,922,929	818,247,000	1,998,000	2,273,280
25	Mar 16, 2026 15:05	167,417	848,549,872	819,346,000	999,000	2,273,280
26	Mar 15, 2026 23:32	167,432	850,651,416	819,418,000	999,000	2,273,280
27	Mar 15, 2026 22:57	167,437	845,346,035	819,440,000	999,000	2,265,088
28	Mar 15, 2026 21:33	167,553	846,367,324	820,009,000	1,000,000	2,461,696
29	Mar 16, 2026 15:05	167,632	858,627,352	820,397,000	999,000	2,273,280
30	Mar 14, 2026 15:10	167,662	846,740,819	813,548,000	7,995,000	241,664
31	Mar 14, 2026 15:10	167,829	848,996,462	815,370,000	6,994,000	253,952
32	Mar 14, 2026 15:10	167,854	851,990,823	815,488,000	6,995,000	331,776
33	Mar 15, 2026 21:33	167,931	849,607,802	822,860,000	0	2,265,088
34	Mar 15, 2026 21:41	167,983	850,552,845	822,118,000	1,000,000	2,273,280
35	Mar 15, 2026 22:57	167,987	854,820,501	821,140,000	1,997,000	2,265,088
36	Mar 14, 2026 15:10	168,027	852,813,772	817,339,000	5,995,000	299,008
37	Mar 15, 2026 23:32	168,284	853,107,793	822,591,000	1,999,000	2,465,792
38	Mar 15, 2026 21:41	168,355	852,655,314	823,939,000	999,000	2,273,280
39	Mar 15, 2026 21:40	168,416	854,549,217	824,239,000	999,000	2,465,792
40	Mar 14, 2026 15:10	168,468	852,145,569	817,500,000	7,995,000	319,488
41	Mar 16, 2026 15:05	168,629	858,243,395	826,283,000	0	2,453,504
42	Mar 15, 2026 21:33	168,856	851,354,616	825,397,000	1,998,000	2,527,232
43	Mar 14, 2026 15:10	169,093	860,091,012	820,562,000	7,995,000	294,912
44	Mar 16, 2026 15:05	169,344	857,943,445	828,786,000	999,000	2,527,232
45	Mar 14, 2026 15:10	170,887	869,228,772	830,354,000	6,994,000	225,280

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