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	1:20.1.2-0ubuntu1~24.04.3	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	3.0.13-0ubuntu3.11	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 26, 2025 04:56

vahook

Error

Source Code

Source code access is restricted. Log in to request access.

Challenge History

Date	Challenger	Cost	Type	Status
Jul 4, 2026 05:25	Victor Mercklé	10.00	Custom	Solution Broken

Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Jul 4, 2026 05:25	0	20,623,080	12,718,000	0	2,113,536	expected "25000000 ", got "24991808 "
2	Jul 4, 2026 05:25	0	20,543,340	12,685,000	0	2,113,536	expected "25000000 ", got "24991808 "
3	Jul 4, 2026 05:25	0	20,943,312	12,725,000	0	2,113,536	expected "25000000 ", got "24991808 "
4	Apr 27, 2025 15:19	4,071	30,156,860	12,024,000	1,002,000	2,502,656
5	Apr 26, 2025 04:55	4,074	26,465,559	12,034,000	1,002,000	2,273,280
6	Apr 26, 2025 04:55	4,093	32,522,494	12,089,000	1,007,000	2,494,464
7	Apr 26, 2025 04:55	4,094	32,980,280	12,095,000	1,007,000	2,494,464
8	Apr 26, 2025 04:56	4,095	34,523,970	12,097,000	1,008,000	2,273,280
9	Apr 26, 2025 04:56	4,098	27,259,571	12,106,000	1,008,000	2,273,280
10	Apr 26, 2025 04:56	4,101	34,892,248	12,115,000	1,009,000	2,273,280
11	Apr 27, 2025 15:18	4,103	29,174,700	12,121,000	1,010,000	2,494,464
12	Apr 26, 2025 04:56	4,108	29,279,290	12,134,000	1,011,000	2,494,464
13	Apr 26, 2025 04:56	4,109	28,401,385	12,139,000	1,011,000	2,273,280
14	Apr 26, 2025 04:56	4,111	30,572,908	12,144,000	1,012,000	2,273,280
15	Apr 27, 2025 15:19	4,113	26,514,477	12,148,000	1,012,000	2,273,280
16	Apr 26, 2025 04:56	4,113	28,605,554	12,150,000	1,012,000	2,490,368
17	Apr 27, 2025 15:19	4,115	26,336,703	12,156,000	1,013,000	2,273,280
18	Apr 26, 2025 04:55	4,116	34,102,818	12,158,000	1,013,000	2,273,280
19	Apr 27, 2025 15:19	4,121	28,493,545	12,173,000	1,014,000	2,502,656
20	Apr 27, 2025 15:18	4,122	26,595,642	13,190,000	0	2,494,464
21	Apr 27, 2025 15:19	4,122	24,498,983	12,176,000	1,014,000	2,273,280
22	Apr 26, 2025 04:55	4,123	30,009,599	11,310,000	1,885,000	2,273,280
23	Apr 26, 2025 04:55	4,123	26,482,141	12,179,000	1,014,000	2,498,560
24	Apr 26, 2025 04:56	4,125	43,668,673	13,200,000	0	2,494,464
25	Apr 27, 2025 15:18	4,125	40,088,292	12,185,000	1,015,000	2,494,464
26	Apr 26, 2025 04:55	4,127	27,238,134	12,190,000	1,015,000	2,498,560
27	Apr 27, 2025 15:19	4,129	25,120,576	12,198,000	1,016,000	2,490,368
28	Apr 26, 2025 04:56	4,130	35,910,452	12,199,000	1,016,000	2,273,280
29	Apr 27, 2025 15:19	4,130	36,611,820	12,200,000	1,016,000	2,498,560
30	Apr 26, 2025 04:55	4,131	33,134,360	13,218,000	0	2,494,464
31	Apr 27, 2025 15:19	4,131	27,574,552	12,202,000	1,016,000	2,273,280
32	Apr 27, 2025 15:19	4,132	30,029,583	13,223,000	0	2,531,328
33	Apr 26, 2025 04:55	4,134	26,191,784	13,230,000	0	2,494,464
34	Apr 27, 2025 15:18	4,134	35,605,364	13,229,000	0	2,498,560
35	Apr 27, 2025 15:19	4,136	26,583,144	13,235,000	0	2,273,280
36	Apr 27, 2025 15:19	4,136	28,305,730	13,234,000	0	2,498,560
37	Apr 27, 2025 15:18	4,137	26,671,873	13,237,000	0	2,490,368
38	Apr 27, 2025 15:19	4,138	36,799,640	13,243,000	0	2,498,560
39	Apr 27, 2025 15:18	4,139	25,264,767	13,246,000	0	2,494,464
40	Apr 27, 2025 15:19	4,141	26,374,646	13,252,000	0	2,273,280
41	Apr 26, 2025 04:55	4,142	29,572,514	12,236,000	1,019,000	2,277,376
42	Apr 26, 2025 04:55	4,148	33,535,866	13,274,000	0	2,273,280
43	Apr 27, 2025 15:19	4,148	31,470,872	13,272,000	0	2,498,560
44	Apr 27, 2025 15:19	4,148	27,580,915	13,273,000	0	2,273,280
45	Apr 27, 2025 15:19	4,149	25,699,585	13,278,000	0	2,498,560
46	Apr 26, 2025 04:55	4,152	37,592,880	13,287,000	0	2,273,280
47	Apr 27, 2025 15:19	4,153	34,481,208	13,291,000	0	2,273,280
48	Apr 26, 2025 04:55	4,157	28,638,763	13,303,000	0	2,273,280
49	Apr 26, 2025 04:55	4,158	31,615,120	13,306,000	0	2,273,280
50	Apr 26, 2025 04:55	4,160	28,457,178	13,313,000	0	2,498,560
51	Apr 26, 2025 04:56	4,163	25,562,684	13,322,000	0	2,273,280
52	Apr 26, 2025 04:55	4,166	28,347,716	13,330,000	0	2,502,656
53	Apr 26, 2025 04:56	4,167	25,737,206	13,333,000	0	2,494,464
54	Apr 26, 2025 04:56	4,173	33,664,918	13,352,000	0	2,273,280
55	Apr 26, 2025 04:55	4,181	29,352,066	13,378,000	0	2,273,280
56	Apr 26, 2025 04:55	4,182	33,410,545	13,383,000	0	2,498,560
57	Apr 27, 2025 15:19	4,203	28,681,669	13,451,000	0	2,498,560

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