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	1:20.1.2-0ubuntu1~24.04.2	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.

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Feb 24, 2026 15:01	4,346	56,873,862	34,070,000	2,004,000	2,498,560
2	Feb 23, 2026 21:44	4,350	53,925,231	34,100,000	2,005,000	2,494,464
3	Feb 24, 2026 15:07	4,353	60,402,089	34,120,000	2,007,000	2,482,176
4	Feb 24, 2026 15:00	4,354	57,049,126	34,133,000	2,007,000	2,490,368
5	Feb 24, 2026 15:01	4,358	57,027,076	34,160,000	2,009,000	2,535,424
6	Feb 24, 2026 15:01	4,362	61,212,693	34,190,000	2,011,000	2,535,424
7	Feb 23, 2026 20:53	4,367	59,263,848	34,229,000	2,013,000	2,498,560
8	Feb 23, 2026 21:05	4,368	61,747,599	34,240,000	2,014,000	2,490,368
9	Feb 23, 2026 21:07	4,372	60,625,460	35,283,000	1,008,000	2,535,424
10	Feb 24, 2026 15:00	4,374	56,934,691	35,293,000	1,008,000	2,494,464
11	Feb 23, 2026 20:52	4,380	57,844,485	35,344,000	1,009,000	2,535,424
12	Feb 24, 2026 15:00	4,382	66,571,614	35,359,000	1,010,000	2,490,368
13	Feb 23, 2026 20:53	4,382	58,047,566	35,363,000	1,010,000	2,535,424
14	Feb 23, 2026 21:05	4,383	58,104,961	35,365,000	1,010,000	2,535,424
15	Feb 23, 2026 21:44	4,383	60,901,259	35,369,000	1,010,000	2,535,424
16	Feb 24, 2026 15:01	4,387	61,886,914	35,401,000	1,011,000	2,494,464
17	Feb 24, 2026 15:07	4,387	60,979,481	35,399,000	1,011,000	2,502,656
18	Feb 23, 2026 20:53	4,389	62,129,471	35,415,000	1,011,000	2,490,368
19	Feb 24, 2026 15:01	4,391	56,950,159	35,432,000	1,012,000	2,535,424
20	Feb 24, 2026 15:00	4,393	58,997,177	35,446,000	1,012,000	2,535,424
21	Feb 23, 2026 20:47	4,395	55,486,342	35,469,000	1,013,000	2,535,424
22	Feb 24, 2026 15:01	4,397	60,128,853	35,486,000	1,013,000	2,535,424
23	Feb 23, 2026 21:44	4,397	57,332,889	35,483,000	1,013,000	2,490,368
24	Feb 24, 2026 15:01	4,398	59,772,606	35,488,000	1,013,000	2,273,280
25	Feb 23, 2026 21:07	4,401	57,594,761	35,518,000	1,014,000	2,494,464
26	Feb 23, 2026 20:52	4,402	54,145,237	35,519,000	1,014,000	2,498,560
27	Feb 23, 2026 21:05	4,403	63,670,369	35,534,000	1,015,000	2,502,656
28	Feb 23, 2026 20:48	4,403	59,016,534	35,527,000	1,015,000	2,506,752
29	Feb 23, 2026 20:48	4,405	63,856,264	35,544,000	1,015,000	2,535,424
30	Feb 23, 2026 21:05	4,406	67,531,798	35,557,000	1,015,000	2,490,368
31	Feb 24, 2026 15:07	4,407	65,787,157	35,564,000	1,016,000	2,535,424
32	Feb 23, 2026 21:05	4,408	59,076,293	35,572,000	1,016,000	2,535,424
33	Feb 24, 2026 15:00	4,436	72,489,480	35,825,000	995,000	2,482,176
34	Feb 23, 2026 21:07	4,439	66,606,455	34,851,000	1,991,000	2,273,280
35	Feb 24, 2026 15:01	4,441	58,032,631	34,866,000	1,992,000	2,535,424
36	Feb 23, 2026 20:52	4,442	61,284,213	34,874,000	1,992,000	2,498,560
37	Feb 23, 2026 20:48	4,462	64,289,398	34,112,000	2,923,000	2,265,088
38	Feb 23, 2026 21:05	4,467	59,976,755	35,071,000	2,004,000	2,498,560
39	Feb 24, 2026 15:01	4,479	58,201,106	35,165,000	2,009,000	2,490,368
40	Feb 23, 2026 20:47	4,524	62,794,612	36,536,000	1,014,000	2,273,280
41	Feb 24, 2026 15:00	8,256	95,204,872	67,516,000	1,007,000	2,535,424
42	Feb 23, 2026 20:47	8,622	94,785,283	70,559,000	1,007,000	2,273,280

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