Count uint8

Count the number of bytes equal to 127 in a binary stream as fast as possible.

Input: 250 000 000 uint8 values in binary on STDIN.

Output: The count of elements equal to 127, printed as a decimal string.

Restrictions:30s512Mb 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 listMar 19, 2026 15:43

Dominique GarmierScore: 4,480Success

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	Mar 19, 2026 15:16	4,433	31,357,812	12,160,000	2,026,000	2,273,280
2	Mar 19, 2026 15:16	4,447	33,761,750	12,197,000	2,032,000	2,273,280
3	Mar 19, 2026 15:14	4,452	34,674,114	12,212,000	2,035,000	2,273,280
4	Mar 19, 2026 15:16	4,454	31,443,191	12,218,000	2,036,000	2,400,256
5	Mar 19, 2026 15:14	4,457	36,238,198	12,226,000	2,037,000	2,396,160
6	Mar 19, 2026 15:14	4,457	35,396,173	12,226,000	2,037,000	2,400,256
7	Mar 19, 2026 15:16	4,459	35,411,305	13,249,000	1,019,000	2,273,280
8	Mar 19, 2026 15:14	4,460	30,824,283	13,254,000	1,019,000	2,273,280
9	Mar 19, 2026 15:16	4,462	31,032,309	12,239,000	2,039,000	2,273,280
10	Mar 19, 2026 15:18	4,463	33,994,091	13,262,000	1,020,000	2,273,280
11	Mar 19, 2026 15:16	4,465	29,569,773	12,247,000	2,041,000	2,404,352
12	Mar 19, 2026 15:17	4,465	37,277,906	13,268,000	1,020,000	2,273,280
13	Mar 19, 2026 15:17	4,465	29,821,167	12,247,000	2,041,000	2,273,280
14	Mar 19, 2026 15:29	4,466	33,484,887	13,272,000	1,020,000	2,392,064
15	Mar 19, 2026 15:29	4,468	32,765,546	14,297,000	0	2,396,160
16	Mar 19, 2026 15:16	4,468	31,105,749	13,278,000	1,021,000	2,408,448
17	Mar 19, 2026 15:17	4,468	29,309,283	13,278,000	1,021,000	2,400,256
18	Mar 19, 2026 15:33	4,470	34,102,258	14,304,000	0	2,396,160
19	Mar 19, 2026 15:14	4,471	32,753,197	14,307,000	0	2,273,280
20	Mar 19, 2026 15:16	4,477	28,944,480	13,303,000	1,023,000	2,273,280
21	Mar 19, 2026 15:13	4,479	31,118,970	14,333,000	0	2,273,280
22	Mar 19, 2026 15:40	4,479	30,389,747	13,309,000	1,023,000	2,273,280
23	Mar 19, 2026 15:14	4,480	28,433,406	13,313,000	1,024,000	2,392,064
24	Mar 19, 2026 15:16	4,481	32,753,005	14,340,000	0	2,273,280
25	Mar 19, 2026 15:43	4,481	30,085,100	12,290,000	2,048,000	2,273,280
26	Mar 19, 2026 15:51	4,481	29,451,820	14,338,000	0	2,396,160
27	Mar 19, 2026 15:14	4,481	31,599,356	14,339,000	0	2,273,280
28	Mar 19, 2026 15:29	4,481	44,246,812	13,316,000	1,024,000	2,519,040
29	Mar 19, 2026 15:33	4,482	38,171,204	13,317,000	1,024,000	2,273,280
30	Mar 19, 2026 15:33	4,483	28,872,371	14,347,000	0	2,273,280
31	Mar 19, 2026 15:51	4,483	31,514,768	14,345,000	0	2,273,280
32	Mar 19, 2026 15:16	4,484	29,956,957	14,349,000	0	2,400,256
33	Mar 19, 2026 15:13	4,485	30,040,266	12,302,000	2,050,000	2,396,160
34	Mar 19, 2026 15:14	4,485	32,511,917	12,301,000	2,050,000	2,273,280
35	Mar 19, 2026 15:16	4,486	32,871,259	13,331,000	1,025,000	2,404,352
36	Mar 19, 2026 15:16	4,486	36,775,351	13,329,000	1,025,000	2,400,256
37	Mar 19, 2026 15:51	4,487	31,486,625	12,306,000	2,051,000	2,396,160
38	Mar 19, 2026 15:40	4,489	31,851,287	13,338,000	1,026,000	2,514,944
39	Mar 19, 2026 15:18	4,492	30,455,648	12,320,000	2,053,000	2,273,280
40	Mar 19, 2026 15:14	4,493	33,228,114	14,377,000	0	2,273,280
41	Mar 19, 2026 15:13	4,500	31,032,570	13,373,000	1,028,000	2,396,160
42	Mar 19, 2026 15:43	4,501	32,638,317	13,376,000	1,028,000	2,273,280
43	Mar 19, 2026 15:40	4,503	35,584,836	14,411,000	0	2,273,280
44	Mar 19, 2026 15:43	4,503	40,012,360	13,380,000	1,029,000	2,273,280
45	Mar 19, 2026 15:18	4,521	30,096,495	13,435,000	1,033,000	2,273,280

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