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.

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Challenge History

Date	Challenger	Cost	Type	Status
Jul 6, 2026 18:42	Victor Mercklé	10.00	Custom	Solution Broken

Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Jul 6, 2026 18:42	0	39,014,149	28,479,000	1,121,000	2,113,536	expected "74600294196621100 ", got "72472647582066220 "
2	Jul 6, 2026 18:42	0	40,111,696	31,050,000	1,172,000	2,113,536	expected "74600294196621100 ", got "74088531012931884 "
3	Jul 6, 2026 18:42	0	41,672,690	32,771,000	1,078,000	2,113,536	expected "74600294196621100 ", got "74099649830473260 "
4	Apr 13, 2026 12:12	4,026	57,166,523	32,403,000	1,012,000	2,277,376
5	Apr 13, 2026 12:12	4,035	56,995,549	32,476,000	1,014,000	2,277,376
6	Apr 13, 2026 12:16	4,037	54,463,032	32,494,000	1,015,000	2,277,376
7	Apr 13, 2026 12:16	4,039	53,782,126	32,509,000	1,015,000	2,494,464
8	Apr 14, 2026 05:39	4,040	61,342,778	32,514,000	1,016,000	2,277,376
9	Apr 13, 2026 12:11	4,040	52,232,960	32,513,000	1,016,000	2,490,368
10	Apr 14, 2026 02:26	4,043	56,323,556	32,537,000	1,016,000	2,490,368
11	Apr 14, 2026 02:27	4,043	56,273,719	32,540,000	1,016,000	2,277,376
12	Apr 13, 2026 12:16	4,047	59,993,419	32,575,000	1,017,000	2,494,464
13	Apr 13, 2026 12:39	4,051	58,171,794	32,608,000	1,019,000	2,277,376
14	Apr 13, 2026 12:39	4,052	61,495,776	32,614,000	1,019,000	2,498,560
15	Apr 14, 2026 02:27	4,053	60,613,503	32,624,000	1,019,000	2,494,464
16	Apr 13, 2026 12:16	4,055	56,884,228	32,635,000	1,019,000	2,494,464
17	Apr 14, 2026 02:26	4,056	58,597,585	32,648,000	1,020,000	2,277,376
18	Apr 13, 2026 12:12	4,076	58,335,357	31,842,000	1,990,000	2,498,560
19	Apr 13, 2026 12:11	4,077	59,825,063	32,841,000	995,000	2,490,368
20	Apr 14, 2026 02:26	4,077	68,048,404	31,845,000	1,990,000	2,494,464
21	Apr 13, 2026 12:16	4,090	60,058,526	31,947,000	1,996,000	2,277,376
22	Apr 13, 2026 12:11	4,178	56,031,756	32,694,000	1,981,000	2,494,464
23	Apr 14, 2026 02:26	4,196	64,682,576	31,839,000	2,984,000	2,277,376
24	Apr 14, 2026 05:39	4,197	57,397,914	32,847,000	1,990,000	2,486,272
25	Apr 13, 2026 12:16	4,203	58,654,773	32,894,000	1,993,000	2,277,376
26	Apr 13, 2026 12:39	4,213	61,529,586	32,967,000	1,998,000	2,486,272
27	Apr 14, 2026 02:26	4,239	58,304,951	33,171,000	2,010,000	2,277,376
28	Apr 14, 2026 02:26	4,272	54,618,127	34,444,000	1,013,000	2,277,376
29	Apr 14, 2026 05:39	4,286	56,260,911	34,555,000	1,016,000	2,486,272
30	Apr 14, 2026 02:27	4,760	68,546,007	38,497,000	1,013,000	2,277,376

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