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 listSep 29, 2025 16:49

sheryllynn24Score: 5,224Success

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	Sep 30, 2025 13:51	5,201	36,474,167	15,602,000	1,040,000	2,285,568
2	Sep 30, 2025 13:51	5,202	33,368,115	15,605,000	1,040,000	2,285,568
3	Sep 29, 2025 16:49	5,203	42,032,408	15,609,000	1,040,000	2,269,184
4	Sep 29, 2025 16:15	5,208	47,757,772	15,626,000	1,041,000	2,285,568
5	Sep 29, 2025 16:15	5,210	46,907,777	15,631,000	1,042,000	2,379,776
6	Sep 29, 2025 16:14	5,210	45,624,651	15,630,000	1,042,000	2,285,568
7	Sep 29, 2025 16:15	5,213	34,347,255	16,681,000	0	2,285,568
8	Sep 29, 2025 16:15	5,214	44,848,654	15,644,000	1,042,000	2,285,568
9	Sep 29, 2025 16:14	5,215	45,655,032	15,646,000	1,043,000	2,273,280
10	Sep 29, 2025 16:14	5,216	44,594,993	15,649,000	1,043,000	2,260,992
11	Sep 30, 2025 13:51	5,218	33,575,259	15,655,000	1,043,000	2,285,568
12	Sep 29, 2025 16:14	5,218	45,708,055	15,656,000	1,043,000	2,285,568
13	Sep 29, 2025 16:14	5,219	33,257,618	15,658,000	1,043,000	2,514,944
14	Sep 30, 2025 13:51	5,219	49,042,116	15,659,000	1,043,000	2,285,568
15	Sep 30, 2025 13:51	5,220	46,623,690	16,705,000	0	2,285,568
16	Sep 29, 2025 16:15	5,224	46,740,724	15,672,000	1,044,000	2,285,568
17	Sep 29, 2025 16:15	5,235	42,331,326	15,705,000	1,047,000	2,265,088
18	Sep 29, 2025 16:14	5,260	45,293,310	14,851,000	1,980,000	2,285,568
19	Sep 30, 2025 13:51	5,262	32,211,743	14,858,000	1,981,000	2,285,568
20	Sep 29, 2025 16:14	5,263	43,206,003	14,860,000	1,981,000	2,523,136
21	Sep 29, 2025 16:15	5,265	33,446,998	14,866,000	1,982,000	2,523,136
22	Sep 29, 2025 16:49	5,266	46,631,924	15,861,000	991,000	2,285,568
23	Sep 29, 2025 16:14	5,266	34,218,835	14,869,000	1,982,000	2,285,568
24	Sep 30, 2025 13:51	5,266	35,677,024	14,870,000	1,982,000	2,265,088
25	Sep 30, 2025 13:51	5,267	46,824,194	15,863,000	991,000	2,363,392
26	Sep 29, 2025 16:15	5,270	48,678,213	15,872,000	992,000	2,285,568
27	Sep 29, 2025 16:49	5,271	33,527,159	14,882,000	1,984,000	2,285,568
28	Sep 29, 2025 16:14	5,271	46,276,576	14,882,000	1,984,000	2,285,568
29	Sep 29, 2025 16:15	5,273	52,695,619	15,882,000	992,000	2,269,184
30	Sep 30, 2025 13:51	5,273	34,498,655	14,887,000	1,985,000	2,285,568

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