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 listApr 13, 2026 17:16

Oleg SkinderevScore: 4,989Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Apr 13, 2026 17:16	4,962	31,320,070	14,887,000	992,000	2,285,568
2	Apr 13, 2026 17:15	4,964	39,755,330	13,901,000	1,985,000	2,400,256
3	Apr 13, 2026 17:32	4,966	44,440,604	14,897,000	993,000	2,400,256
4	Apr 13, 2026 17:15	4,968	44,579,420	13,912,000	1,987,000	2,404,352
5	Apr 13, 2026 17:35	4,968	41,713,017	14,905,000	993,000	2,408,448
6	Apr 13, 2026 17:15	4,972	37,508,608	15,909,000	0	2,408,448
7	Apr 13, 2026 17:15	4,973	38,022,755	13,924,000	1,989,000	2,392,064
8	Apr 13, 2026 17:32	4,973	34,710,132	14,921,000	994,000	2,285,568
9	Apr 13, 2026 17:16	4,974	38,161,541	13,929,000	1,989,000	2,396,160
10	Apr 13, 2026 17:15	4,978	33,514,840	13,937,000	1,991,000	2,396,160
11	Apr 13, 2026 17:16	4,978	37,576,317	15,931,000	0	2,285,568
12	Apr 13, 2026 17:32	4,978	43,178,103	14,936,000	995,000	2,285,568
13	Apr 13, 2026 17:35	4,983	38,530,076	13,953,000	1,993,000	2,396,160
14	Apr 13, 2026 17:32	4,985	32,190,556	14,955,000	997,000	2,404,352
15	Apr 13, 2026 17:15	4,986	35,907,633	13,962,000	1,994,000	2,281,472
16	Apr 13, 2026 17:16	4,988	33,517,462	13,965,000	1,995,000	2,285,568
17	Apr 13, 2026 17:15	4,989	37,331,292	13,969,000	1,995,000	2,285,568
18	Apr 13, 2026 17:15	4,989	37,668,715	14,968,000	997,000	2,404,352
19	Apr 13, 2026 17:32	4,990	34,236,250	13,972,000	1,996,000	2,396,160
20	Apr 13, 2026 17:32	4,992	37,560,410	14,976,000	998,000	2,285,568
21	Apr 13, 2026 17:16	4,993	39,792,361	14,979,000	998,000	2,404,352
22	Apr 13, 2026 17:16	4,997	38,993,042	13,991,000	1,998,000	2,285,568
23	Apr 13, 2026 17:35	5,002	43,758,668	15,006,000	1,000,000	2,404,352
24	Apr 13, 2026 17:32	5,004	43,525,929	14,013,000	2,001,000	2,396,160
25	Apr 13, 2026 17:16	5,008	35,344,967	14,024,000	2,003,000	2,285,568
26	Apr 13, 2026 17:15	5,010	35,374,829	14,029,000	2,004,000	2,285,568
27	Apr 13, 2026 17:15	5,011	30,165,226	15,034,000	1,002,000	2,285,568
28	Apr 13, 2026 17:15	5,015	38,986,430	14,042,000	2,006,000	2,519,040
29	Apr 13, 2026 17:32	5,018	42,719,588	14,052,000	2,007,000	2,494,464
30	Apr 13, 2026 17:15	5,019	40,642,712	16,060,000	0	2,396,160
31	Apr 13, 2026 17:16	5,023	37,918,643	14,063,000	2,009,000	2,519,040
32	Apr 13, 2026 17:32	5,028	41,831,740	14,078,000	2,011,000	2,396,160
33	Apr 13, 2026 17:16	5,030	42,946,525	14,085,000	2,012,000	2,285,568

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