TopK

Find the sum of the 100 largest values in a stream of binary integers as fast as possible.

Input: 100 000 000 uint32 values in little-endian binary on STDIN (4 bytes each).

Output: The uint64 sum of the top 100 greatest values, printed as a decimal string.

Restrictions:60s512Mb 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 18, 2023 12:33

mmalczakScore: 122,670Success

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 18, 2023 12:34	93,684	60,666,025	33,644,000	1,019,000	2,527,232
2	Sep 18, 2023 12:34	94,569	98,305,330	34,990,461	0	2,260,992
3	Sep 18, 2023 12:34	94,856	93,594,695	35,096,647	0	2,256,896
4	Sep 18, 2023 12:34	95,270	60,510,801	33,236,000	2,014,000	2,289,664
5	Sep 18, 2023 12:34	95,311	60,302,254	34,258,000	1,007,000	2,527,232
6	Sep 18, 2023 12:34	95,338	102,596,014	35,275,099	0	2,269,184
7	Sep 18, 2023 12:34	95,851	60,554,643	34,452,000	1,013,000	2,289,664
8	Sep 18, 2023 12:34	95,908	58,944,825	34,473,000	1,013,000	2,289,664
9	Sep 18, 2023 12:34	95,927	64,836,417	33,465,000	2,028,000	2,289,664
10	Sep 18, 2023 12:34	96,616	67,681,493	34,755,000	993,000	2,289,664
11	Sep 18, 2023 12:34	96,832	62,890,314	33,838,000	1,990,000	2,289,664
12	Sep 18, 2023 12:34	96,854	62,533,388	33,846,000	1,990,000	2,273,280
13	Sep 16, 2023 16:46	122,022	67,697,109	43,142,000	2,006,000	2,269,184
14	Sep 18, 2023 12:33	122,365	67,878,880	43,263,000	2,012,000	2,289,664
15	Sep 16, 2023 16:46	122,424	68,985,203	43,284,000	2,013,000	2,351,104
16	Sep 18, 2023 12:33	122,451	67,965,113	43,294,000	2,013,000	2,273,280
17	Sep 18, 2023 12:33	122,495	72,391,356	43,309,000	2,014,000	2,281,472
18	Sep 16, 2023 16:46	122,659	75,567,562	43,367,000	2,017,000	2,289,664
19	Sep 18, 2023 12:33	122,670	72,504,072	44,380,000	1,008,000	2,277,376
20	Sep 16, 2023 16:46	122,800	70,125,249	43,417,000	2,019,000	2,289,664
21	Sep 16, 2023 16:46	122,849	71,343,481	44,444,000	1,010,000	2,289,664
22	Sep 16, 2023 16:46	122,889	70,688,260	43,449,000	2,020,000	2,289,664
23	Sep 18, 2023 12:33	122,897	68,352,202	44,462,000	1,010,000	2,289,664
24	Sep 16, 2023 16:46	122,946	72,397,379	45,490,000	0	2,269,184
25	Sep 16, 2023 16:46	123,397	78,421,726	45,657,000	0	2,527,232
26	Sep 18, 2023 12:33	123,884	71,695,410	44,841,000	996,000	2,269,184
27	Sep 18, 2023 12:33	123,889	71,754,072	43,846,000	1,993,000	2,289,664
28	Sep 18, 2023 12:33	123,927	71,735,568	44,857,000	996,000	2,273,280
29	Sep 18, 2023 12:33	123,981	73,281,661	43,879,000	1,994,000	2,289,664
30	Sep 16, 2023 16:46	124,065	69,207,674	43,909,000	1,995,000	2,531,328
31	Sep 18, 2023 12:33	127,027	107,586,973	46,999,983	0	2,260,992
32	Sep 18, 2023 12:33	128,367	126,654,901	47,495,674	0	2,273,280
33	Sep 16, 2023 16:46	128,820	104,656,694	47,663,390	0	2,269,184
34	Sep 16, 2023 16:46	130,302	110,507,971	48,211,591	0	2,260,992
35	Sep 16, 2023 16:46	130,618	110,475,005	48,328,698	0	2,265,088
36	Sep 18, 2023 12:33	131,666	113,259,230	48,716,512	0	2,273,280

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