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 13:32

olliecrowScore: 4,350Success

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 13:30	4,326	36,649,193	12,855,000	988,000	2,281,472
2	Mar 28, 2026 13:33	4,332	31,827,085	11,882,000	1,980,000	2,490,368
3	Mar 28, 2026 13:32	4,333	28,766,248	12,877,000	990,000	2,494,464
4	Mar 28, 2026 13:33	4,335	32,892,710	12,881,000	990,000	2,494,464
5	Mar 28, 2026 13:31	4,335	38,583,818	13,873,000	0	2,498,560
6	Mar 28, 2026 13:32	4,336	28,740,962	12,883,000	991,000	2,498,560
7	Mar 28, 2026 13:31	4,336	29,690,497	12,885,000	991,000	2,494,464
8	Mar 28, 2026 13:32	4,337	32,944,389	13,877,000	0	2,490,368
9	Mar 28, 2026 13:33	4,337	27,888,840	12,887,000	991,000	2,494,464
10	Mar 28, 2026 13:31	4,337	30,905,199	13,879,000	0	2,498,560
11	Mar 28, 2026 13:32	4,338	32,271,962	12,892,000	991,000	2,498,560
12	Mar 28, 2026 13:32	4,338	45,009,895	12,891,000	991,000	2,494,464
13	Mar 28, 2026 13:33	4,338	26,041,179	12,891,000	991,000	2,494,464
14	Mar 28, 2026 13:33	4,339	31,499,123	13,886,000	0	2,494,464
15	Mar 28, 2026 13:33	4,340	42,586,319	12,897,000	992,000	2,281,472
16	Mar 28, 2026 13:32	4,341	43,628,479	13,891,000	0	2,498,560
17	Mar 28, 2026 13:31	4,342	29,051,672	12,901,000	992,000	2,490,368
18	Mar 28, 2026 13:33	4,343	29,427,086	13,897,000	0	2,281,472
19	Mar 28, 2026 13:32	4,343	31,220,903	12,906,000	992,000	2,281,472
20	Mar 28, 2026 13:31	4,344	31,149,679	12,908,000	992,000	2,490,368
21	Mar 28, 2026 13:31	4,344	28,172,422	12,909,000	993,000	2,281,472
22	Mar 28, 2026 13:32	4,346	33,548,400	12,914,000	993,000	2,494,464
23	Mar 28, 2026 13:31	4,347	29,709,963	12,917,000	993,000	2,281,472
24	Mar 28, 2026 13:33	4,349	39,640,365	12,923,000	994,000	2,281,472
25	Mar 28, 2026 13:31	4,349	28,102,340	13,918,000	0	2,498,560
26	Mar 28, 2026 13:33	4,349	38,825,995	12,922,000	994,000	2,281,472
27	Mar 28, 2026 13:31	4,349	29,006,621	11,929,000	1,988,000	2,281,472
28	Mar 28, 2026 13:33	4,349	32,356,208	12,923,000	994,000	2,494,464
29	Mar 28, 2026 13:32	4,350	28,585,157	13,920,000	0	2,281,472
30	Mar 28, 2026 13:31	4,350	37,274,907	12,926,000	994,000	2,498,560
31	Mar 28, 2026 13:33	4,350	40,843,104	12,925,000	994,000	2,281,472
32	Mar 28, 2026 13:30	4,351	31,453,634	12,929,000	994,000	2,502,656
33	Mar 28, 2026 13:33	4,351	33,177,377	11,935,000	1,989,000	2,281,472
34	Mar 28, 2026 13:30	4,351	29,156,208	12,929,000	994,000	2,281,472
35	Mar 28, 2026 13:31	4,353	26,674,111	12,936,000	995,000	2,281,472
36	Mar 28, 2026 13:33	4,353	26,050,573	12,935,000	995,000	2,490,368
37	Mar 28, 2026 13:31	4,354	30,127,326	13,932,000	0	2,506,752
38	Mar 28, 2026 13:32	4,354	31,773,997	12,938,000	995,000	2,490,368
39	Mar 28, 2026 13:30	4,359	32,085,345	12,953,000	996,000	2,498,560
40	Mar 28, 2026 13:31	4,359	28,678,240	12,952,000	996,000	2,490,368
41	Mar 28, 2026 13:33	4,360	31,291,448	12,957,000	996,000	2,281,472
42	Mar 28, 2026 13:30	4,361	33,611,512	12,960,000	996,000	2,281,472
43	Mar 28, 2026 13:31	4,363	29,341,337	12,966,000	997,000	2,277,376
44	Mar 28, 2026 13:32	4,364	41,162,490	12,968,000	997,000	2,281,472
45	Mar 28, 2026 13:33	4,365	29,075,466	11,972,000	1,995,000	2,281,472
46	Mar 28, 2026 13:32	4,366	38,828,391	12,974,000	998,000	2,281,472
47	Mar 28, 2026 13:30	4,367	28,146,378	12,976,000	998,000	2,281,472
48	Mar 28, 2026 13:31	4,367	30,487,688	11,977,000	1,996,000	2,281,472
49	Mar 28, 2026 13:32	4,368	30,552,696	12,980,000	998,000	2,281,472
50	Mar 28, 2026 13:32	4,368	35,358,559	12,979,000	998,000	2,498,560
51	Mar 28, 2026 13:31	4,368	29,809,641	11,982,000	1,997,000	2,281,472
52	Mar 28, 2026 13:32	4,370	33,382,309	11,986,000	1,997,000	2,281,472
53	Mar 28, 2026 13:33	4,371	31,537,563	12,988,000	999,000	2,494,464
54	Mar 28, 2026 13:33	4,372	26,707,542	12,990,000	999,000	2,281,472
55	Mar 28, 2026 13:31	4,374	32,844,623	12,998,000	999,000	2,273,280
56	Mar 28, 2026 13:32	4,375	38,128,480	12,001,000	2,000,000	2,281,472
57	Mar 28, 2026 13:33	4,378	34,937,332	13,010,000	1,000,000	2,281,472
58	Mar 28, 2026 13:31	4,396	30,236,424	13,062,000	1,004,000	2,277,376
59	Mar 28, 2026 13:32	4,402	29,199,431	13,079,000	1,006,000	2,281,472
60	Mar 28, 2026 13:32	4,424	40,829,157	12,136,000	2,022,000	2,281,472

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