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 28, 2026 08:36

olliecrowScore: 4,428Success

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 28, 2026 08:36	4,396	29,707,837	12,058,000	2,009,000	2,285,568
2	Mar 28, 2026 08:37	4,397	28,454,263	12,060,000	2,010,000	2,412,544
3	Mar 28, 2026 08:36	4,406	36,620,981	12,084,000	2,014,000	2,408,448
4	Mar 28, 2026 08:37	4,410	42,181,736	12,096,000	2,016,000	2,408,448
5	Mar 28, 2026 08:35	4,411	31,597,188	12,100,000	2,016,000	2,400,256
6	Mar 28, 2026 08:37	4,412	27,783,499	12,102,000	2,017,000	2,285,568
7	Mar 28, 2026 08:35	4,414	31,396,693	13,116,000	1,008,000	2,396,160
8	Mar 28, 2026 08:35	4,417	29,701,182	12,116,000	2,019,000	2,285,568
9	Mar 28, 2026 08:35	4,419	42,479,192	12,120,000	2,020,000	2,396,160
10	Mar 28, 2026 08:37	4,420	35,457,499	13,134,000	1,010,000	2,412,544
11	Mar 28, 2026 08:37	4,420	34,495,815	13,133,000	1,010,000	2,408,448
12	Mar 28, 2026 08:35	4,421	31,518,202	12,127,000	2,021,000	2,285,568
13	Mar 28, 2026 08:37	4,422	31,905,267	13,139,000	1,010,000	2,404,352
14	Mar 28, 2026 08:36	4,423	32,338,396	13,144,000	1,011,000	2,408,448
15	Mar 28, 2026 08:36	4,427	33,152,883	13,155,000	1,011,000	2,285,568
16	Mar 28, 2026 08:35	4,428	31,192,888	12,144,000	2,024,000	2,404,352
17	Mar 28, 2026 08:35	4,428	34,912,010	12,146,000	2,024,000	2,285,568
18	Mar 28, 2026 08:36	4,430	34,430,017	12,151,000	2,025,000	2,285,568
19	Mar 28, 2026 08:35	4,430	37,305,515	13,165,000	1,012,000	2,285,568
20	Mar 28, 2026 08:35	4,430	34,854,983	12,150,000	2,025,000	2,519,040
21	Mar 28, 2026 08:36	4,431	33,478,294	13,167,000	1,012,000	2,412,544
22	Mar 28, 2026 08:37	4,431	30,474,030	12,153,000	2,025,000	2,285,568
23	Mar 28, 2026 08:35	4,431	30,226,176	13,168,000	1,012,000	2,404,352
24	Mar 28, 2026 08:36	4,431	44,820,109	13,168,000	1,012,000	2,400,256
25	Mar 28, 2026 08:35	4,434	41,118,329	13,176,000	1,013,000	2,404,352
26	Mar 28, 2026 08:37	4,434	31,348,456	12,162,000	2,027,000	2,285,568
27	Mar 28, 2026 08:37	4,434	38,944,702	12,162,000	2,027,000	2,510,848
28	Mar 28, 2026 08:36	4,441	45,499,067	13,196,000	1,015,000	2,412,544
29	Mar 28, 2026 08:36	4,472	31,585,838	13,287,000	1,022,000	2,285,568
30	Mar 28, 2026 08:35	4,478	40,921,486	13,305,000	1,023,000	2,285,568

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