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 18, 2026 10:12	6,265	78,967,112	49,999,000	1,999,000	2,277,376
2	Feb 18, 2026 10:16	6,296	72,554,749	47,234,000	5,024,000	2,445,312
3	Feb 18, 2026 10:07	6,298	75,754,314	49,261,000	3,016,000	2,322,432
4	Feb 18, 2026 10:03	6,323	75,363,749	48,442,000	4,036,000	2,449,408
5	Feb 18, 2026 10:07	6,325	74,654,839	49,470,000	3,028,000	2,318,336
6	Feb 18, 2026 10:07	6,326	76,625,474	49,477,000	3,029,000	2,338,816
7	Feb 18, 2026 10:03	6,333	84,288,625	49,531,000	3,032,000	2,371,584
8	Feb 18, 2026 10:12	6,348	79,065,378	49,646,000	3,039,000	2,363,392
9	Feb 18, 2026 10:16	6,360	80,512,348	51,796,000	996,000	2,408,448
10	Feb 18, 2026 10:16	6,366	81,557,223	48,847,000	3,987,000	2,330,624
11	Feb 18, 2026 10:14	6,368	76,136,179	49,865,000	2,991,000	2,473,984
12	Feb 18, 2026 10:14	6,383	80,538,306	49,984,000	2,999,000	2,441,216
13	Feb 18, 2026 10:14	6,391	75,034,111	49,042,000	4,003,000	2,383,872
14	Feb 18, 2026 10:03	6,419	78,284,417	51,266,000	2,010,000	2,355,200
15	Feb 18, 2026 10:12	6,484	81,700,723	51,823,000	1,993,000	2,342,912
16	Feb 18, 2026 10:14	7,140	85,337,167	56,249,000	3,013,000	2,392,064
17	Feb 18, 2026 10:14	7,155	86,072,439	56,371,000	3,019,000	2,424,832
18	Feb 18, 2026 10:14	7,166	82,857,106	56,451,000	3,024,000	2,318,336
19	Feb 18, 2026 10:14	7,177	84,214,631	55,535,000	4,038,000	2,416,640
20	Feb 18, 2026 10:14	7,204	91,878,149	56,803,000	2,989,000	2,445,312
21	Feb 18, 2026 10:03	7,225	86,002,794	58,971,000	999,000	2,523,136
22	Feb 18, 2026 10:14	7,235	82,108,500	56,049,000	4,003,000	2,281,472
23	Feb 18, 2026 10:12	7,244	82,452,424	57,120,000	3,006,000	2,482,176
24	Feb 18, 2026 10:12	7,255	86,369,213	59,214,000	1,003,000	2,510,848
25	Feb 18, 2026 10:03	7,264	80,873,933	57,280,000	3,014,000	2,277,376
26	Feb 18, 2026 10:16	7,271	90,504,106	57,336,000	3,017,000	2,498,560
27	Feb 18, 2026 10:12	7,328	94,459,321	58,830,000	1,994,000	2,502,656
28	Feb 18, 2026 10:14	7,329	90,871,812	56,842,000	3,988,000	2,465,792
29	Feb 18, 2026 10:14	7,351	88,350,308	59,010,000	2,000,000	2,424,832
30	Feb 18, 2026 10:07	7,363	83,575,718	58,109,000	3,005,000	2,506,752
31	Feb 18, 2026 10:14	7,365	83,843,516	58,124,000	3,006,000	2,420,736
32	Feb 18, 2026 10:03	7,386	82,856,906	58,292,000	3,015,000	2,478,080
33	Feb 18, 2026 10:16	7,395	82,173,798	59,370,000	2,012,000	2,359,296
34	Feb 18, 2026 10:07	7,446	92,554,582	57,818,000	3,987,000	2,469,888
35	Feb 18, 2026 10:07	7,519	86,276,644	59,390,000	3,019,000	2,445,312
36	Feb 18, 2026 10:16	7,580	89,309,448	59,916,000	2,995,000	2,473,984

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