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 listMar 20, 2026 22:00

olliecrowScore: 102,254Success

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 20, 2026 22:05	100,751	63,659,104	35,263,000	2,015,000	2,408,448
2	Mar 20, 2026 22:03	100,973	62,578,209	35,341,000	2,019,000	2,326,528
3	Mar 20, 2026 22:04	101,051	61,353,956	35,368,000	2,021,000	2,342,912
4	Mar 20, 2026 22:02	101,116	59,828,434	34,380,000	3,033,000	2,342,912
5	Mar 20, 2026 22:02	101,176	58,069,984	34,400,000	3,035,000	2,408,448
6	Mar 20, 2026 21:59	101,281	61,437,699	34,436,000	3,038,000	2,404,352
7	Mar 20, 2026 21:59	101,308	58,115,528	35,458,000	2,026,000	2,342,912
8	Mar 20, 2026 22:04	101,338	62,108,588	36,482,000	1,013,000	2,342,912
9	Mar 20, 2026 22:04	101,503	58,703,936	35,526,000	2,030,000	2,400,256
10	Mar 20, 2026 22:00	101,522	58,478,908	35,533,000	2,030,000	2,404,352
11	Mar 20, 2026 21:59	101,568	68,918,662	36,565,000	1,015,000	2,342,912
12	Mar 20, 2026 22:00	101,643	64,335,553	35,576,000	2,032,000	2,326,528
13	Mar 20, 2026 22:05	101,722	73,628,956	35,603,000	2,034,000	2,412,544
14	Mar 20, 2026 22:04	101,938	67,878,009	35,679,000	2,038,000	2,404,352
15	Mar 20, 2026 22:01	102,232	63,942,008	34,840,000	2,986,000	2,342,912
16	Mar 20, 2026 22:01	102,251	63,519,971	35,842,000	1,991,000	2,342,912
17	Mar 20, 2026 22:00	102,254	73,992,626	36,839,000	995,000	2,408,448
18	Mar 20, 2026 22:03	102,300	65,954,152	34,863,000	2,988,000	2,404,352
19	Mar 20, 2026 22:03	102,314	67,922,345	34,868,000	2,988,000	2,400,256
20	Mar 20, 2026 22:00	102,316	62,838,395	35,865,000	1,992,000	2,396,160
21	Mar 20, 2026 21:59	102,332	63,859,014	34,874,000	2,989,000	2,330,624
22	Mar 20, 2026 22:03	102,376	66,410,980	35,886,000	1,993,000	2,342,912
23	Mar 20, 2026 22:00	102,395	68,204,763	35,892,000	1,994,000	2,342,912
24	Mar 20, 2026 22:04	102,414	63,074,551	35,899,000	1,994,000	2,342,912
25	Mar 20, 2026 22:02	102,630	66,339,772	34,976,000	2,997,000	2,342,912
26	Mar 20, 2026 22:03	102,632	68,573,196	34,976,000	2,998,000	2,342,912
27	Mar 20, 2026 21:59	102,708	64,378,556	35,002,000	3,000,000	2,404,352
28	Mar 20, 2026 21:59	102,870	62,472,314	35,058,000	3,004,000	2,400,256
29	Mar 20, 2026 22:00	102,959	61,623,707	36,090,000	2,005,000	2,404,352
30	Mar 20, 2026 22:05	102,962	63,882,722	35,089,000	3,007,000	2,400,256
31	Mar 20, 2026 22:01	103,351	57,488,094	36,228,000	2,012,000	2,506,752
32	Mar 20, 2026 22:04	104,697	64,497,984	36,752,000	1,986,000	2,342,912
33	Mar 20, 2026 22:03	108,611	65,041,888	38,126,000	2,060,000	2,408,448

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