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 19:59	Victor Mercklé	10.00	Custom	Solution Broken

Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Jul 6, 2026 19:59	0	37,225,766	28,183,000	1,107,000	2,113,536	expected "74600294196621100 ", got "72979894807037228 "
2	Jul 6, 2026 19:59	0	38,504,528	29,544,000	1,072,000	2,113,536	expected "74600294196621100 ", got "72979359063237420 "
3	Jul 6, 2026 19:59	0	37,040,594	28,175,000	1,070,000	2,113,536	expected "74600294196621100 ", got "72979406820153644 "
4	Apr 13, 2026 10:44	4,045	62,654,220	32,557,000	1,017,000	2,494,464
5	Apr 13, 2026 10:41	4,050	66,500,705	32,601,000	1,018,000	2,277,376
6	Apr 13, 2026 10:33	4,051	59,703,079	32,603,000	1,018,000	2,498,560
7	Apr 13, 2026 10:44	4,052	60,949,633	32,612,000	1,019,000	2,277,376
8	Apr 13, 2026 10:43	4,055	66,809,843	32,638,000	1,019,000	2,277,376
9	Apr 13, 2026 10:44	4,061	61,630,638	31,726,000	1,982,000	2,502,656
10	Apr 13, 2026 10:43	4,061	60,548,053	31,726,000	1,982,000	2,277,376
11	Apr 13, 2026 10:33	4,074	59,755,028	31,825,000	1,989,000	2,277,376
12	Apr 13, 2026 10:33	4,077	63,614,136	31,847,000	1,990,000	2,494,464
13	Apr 13, 2026 10:43	4,077	58,847,197	32,845,000	995,000	2,277,376
14	Apr 13, 2026 10:43	4,077	66,561,015	32,844,000	995,000	2,277,376
15	Apr 13, 2026 10:43	4,078	57,575,648	31,854,000	1,990,000	2,277,376
16	Apr 13, 2026 10:44	4,078	61,977,678	31,860,000	1,991,000	2,498,560
17	Apr 13, 2026 10:44	4,078	56,809,824	32,850,000	995,000	2,490,368
18	Apr 13, 2026 10:43	4,078	56,350,545	32,851,000	995,000	2,482,176
19	Apr 13, 2026 10:42	4,078	61,478,204	32,849,000	995,000	2,490,368
20	Apr 13, 2026 10:43	4,079	64,368,620	31,865,000	1,991,000	2,277,376
21	Apr 13, 2026 10:41	4,081	57,438,280	32,848,000	1,026,000	2,502,656
22	Apr 13, 2026 10:41	4,082	55,246,877	31,885,000	1,992,000	2,277,376
23	Apr 13, 2026 10:43	4,086	57,891,937	31,919,000	1,994,000	2,281,472
24	Apr 13, 2026 10:33	4,087	53,829,539	31,931,000	1,995,000	2,277,376
25	Apr 13, 2026 10:33	4,088	53,136,158	31,933,000	1,995,000	2,502,656
26	Apr 13, 2026 10:44	4,098	52,935,329	32,011,000	2,000,000	2,498,560
27	Apr 13, 2026 10:33	4,098	59,484,633	32,012,000	2,000,000	2,277,376
28	Apr 13, 2026 10:41	4,117	57,840,221	32,164,000	2,010,000	2,277,376
29	Apr 13, 2026 10:33	4,148	57,903,235	33,419,000	1,012,000	2,277,376
30	Apr 13, 2026 10:43	4,200	64,948,754	32,870,000	1,992,000	2,277,376
31	Apr 13, 2026 10:42	4,213	63,278,276	32,971,000	1,998,000	2,490,368
32	Apr 13, 2026 10:41	4,216	62,824,858	32,991,000	1,999,000	2,277,376
33	Apr 13, 2026 10:44	4,223	61,677,093	33,045,000	2,002,000	2,277,376
34	Apr 13, 2026 10:41	4,238	56,592,356	33,163,000	2,009,000	2,277,376
35	Apr 13, 2026 10:44	4,251	56,448,776	34,272,000	1,008,000	2,498,560
36	Apr 13, 2026 10:41	4,254	59,018,362	34,304,000	1,008,000	2,277,376
37	Apr 13, 2026 10:41	4,269	55,318,048	34,421,000	1,012,000	2,486,272
38	Apr 13, 2026 10:41	4,292	62,409,285	34,603,000	1,017,000	2,490,368
39	Apr 13, 2026 10:42	4,298	59,764,173	34,654,000	1,019,000	2,277,376
40	Apr 13, 2026 10:33	4,319	60,071,542	34,851,000	995,000	2,490,368
41	Apr 13, 2026 10:44	4,575	63,599,790	35,972,000	1,998,000	2,277,376
42	Apr 13, 2026 10:33	4,753	66,312,646	38,441,000	1,011,000	2,490,368

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