Parse integers

Compute the sum of integers read from STDIN as fast as possible.

Input: 50 000 000 lines, each containing one integer in the range [0; 2147483647].

Output: The uint64 sum of all numbers, printed as a decimal string.

Note: Integer overflow is expected – use a 64-bit accumulator.

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 listMar 14, 2026 18:31

Error

Source Code

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

Challenge History

Date	Challenger	Cost	Type	Status
Jul 6, 2026 23:12	Victor Mercklé	10.00	Custom	Solution Broken

Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Jul 6, 2026 23:12	0	41,096,349	31,866,000	1,093,000	2,113,536	expected "74600294196621100 ", got "72755191567163180 "
2	Jul 6, 2026 23:12	0	41,414,836	32,219,000	1,067,000	2,113,536	expected "74600294196621100 ", got "73511931655299884 "
3	Jul 6, 2026 23:12	0	41,035,854	31,799,000	1,089,000	2,113,536	expected "74600294196621100 ", got "72758857646763820 "
4	Mar 14, 2026 18:42	4,260	56,989,678	34,350,000	1,010,000	2,273,280
5	Mar 14, 2026 18:10	4,262	56,329,692	34,367,000	1,010,000	2,494,464
6	Mar 14, 2026 18:42	4,263	60,297,394	34,369,000	1,010,000	2,273,280
7	Mar 14, 2026 18:12	4,263	58,844,285	34,372,000	1,010,000	2,498,560
8	Mar 14, 2026 18:12	4,265	62,058,612	34,391,000	1,011,000	2,494,464
9	Mar 14, 2026 18:01	4,266	58,800,405	34,394,000	1,011,000	2,273,280
10	Mar 14, 2026 18:10	4,266	55,121,134	34,393,000	1,011,000	2,527,232
11	Mar 14, 2026 18:01	4,267	55,148,422	34,406,000	1,011,000	2,273,280
12	Mar 14, 2026 18:42	4,267	63,465,511	34,406,000	1,011,000	2,494,464
13	Mar 14, 2026 18:12	4,267	60,327,420	34,401,000	1,011,000	2,273,280
14	Mar 14, 2026 18:42	4,269	58,189,882	34,419,000	1,012,000	2,273,280
15	Mar 14, 2026 18:12	4,270	53,201,200	34,430,000	1,012,000	2,486,272
16	Mar 14, 2026 18:10	4,271	60,292,232	34,441,000	1,012,000	2,273,280
17	Mar 14, 2026 18:31	4,271	52,936,217	34,434,000	1,012,000	2,502,656
18	Mar 14, 2026 18:10	4,272	63,573,569	34,443,000	1,013,000	2,494,464
19	Mar 14, 2026 18:10	4,273	60,617,561	34,451,000	1,013,000	2,273,280
20	Mar 14, 2026 18:10	4,273	56,232,188	34,450,000	1,013,000	2,531,328
21	Mar 14, 2026 18:01	4,274	55,366,756	34,460,000	1,013,000	2,482,176
22	Mar 14, 2026 18:01	4,274	56,883,895	34,458,000	1,013,000	2,494,464
23	Mar 14, 2026 18:12	4,277	61,600,918	34,483,000	1,014,000	2,502,656
24	Mar 14, 2026 18:14	4,279	59,384,624	34,504,000	1,014,000	2,502,656
25	Mar 14, 2026 18:12	4,280	58,944,888	34,510,000	1,015,000	2,273,280
26	Mar 14, 2026 18:01	4,280	59,723,137	34,509,000	1,014,000	2,273,280
27	Mar 14, 2026 18:14	4,280	61,050,931	34,509,000	1,014,000	2,273,280
28	Mar 14, 2026 18:42	4,281	65,883,204	34,517,000	1,015,000	2,494,464
29	Mar 14, 2026 18:01	4,281	55,679,514	34,516,000	1,015,000	2,531,328
30	Mar 14, 2026 18:10	4,282	57,657,140	34,522,000	1,015,000	2,494,464
31	Mar 14, 2026 18:12	4,282	54,691,234	34,527,000	1,015,000	2,273,280
32	Mar 14, 2026 18:12	4,283	62,306,453	34,531,000	1,015,000	2,490,368
33	Mar 14, 2026 18:10	4,283	61,551,995	34,530,000	1,015,000	2,273,280
34	Mar 14, 2026 18:12	4,283	63,000,312	34,533,000	1,015,000	2,273,280
35	Mar 14, 2026 18:01	4,284	66,142,141	34,540,000	1,015,000	2,494,464
36	Mar 14, 2026 18:01	4,284	60,427,932	34,541,000	1,015,000	2,273,280
37	Mar 14, 2026 18:42	4,285	59,868,704	34,548,000	1,016,000	2,498,560
38	Mar 14, 2026 18:42	4,287	63,707,796	34,562,000	1,016,000	2,273,280
39	Mar 14, 2026 18:01	4,312	60,809,281	33,801,000	1,988,000	2,486,272
40	Mar 14, 2026 18:10	4,316	62,791,484	33,830,000	1,990,000	2,273,280
41	Mar 14, 2026 18:42	4,319	60,839,625	34,854,000	995,000	2,498,560
42	Mar 14, 2026 18:14	4,321	63,802,870	33,871,000	1,992,000	2,273,280
43	Mar 14, 2026 18:31	4,325	60,667,997	33,901,000	1,994,000	2,502,656
44	Mar 14, 2026 18:31	4,330	61,846,410	33,944,000	1,996,000	2,494,464
45	Mar 14, 2026 18:42	4,332	60,089,097	33,958,000	1,997,000	2,502,656

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