Parse dateTime

Compute the sum of 5,000,000 UTC Unix timestamps as fast as possible.

Input

One RFC 3339 datetime per line on STDIN:

2017-05-04T14:31:30-03:00
2046-06-23T11:51:56-06:00
2031-08-14T13:18:38+06:00
2048-04-14T05:55:06-09:00
1980-08-28T00:43:03+02:00

Output

Print the sum of all UTC Unix timestamps (int64) to STDOUT.

Constraints

Datetimes are in the range 1950-01-01T00:00:00 to 2050-12-31T23:59:59

Restrictions:30s256Mb 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.

#	Author	Score	Language	Solution
1	Victor Mercklé Grandmaster	2,388	RUST rust-1.95.0	Jul 7, 2026 02:02 18,850,860 ns · 10,747,000 ns · 0 ns · 2,117,632 B
2	Yuriy Lyfenko Expert	3,001	CPP g++13.2.0	Dec 10, 2024 13:46 633,221,070 ns · 12,467,000 ns · 1,038,000 ns · 2,523,136 B
3	Victor Muñoz Apprentice	3,128	CPP g++13.2.0	Mar 30, 2025 00:13 37,136,366 ns · 13,072,000 ns · 1,005,000 ns · 2,277,376 B
4	Andrew Tsibin Expert	3,730	RUST rust-1.95.0	Jul 16, 2026 16:08 26,466,790 ns · 15,755,000 ns · 1,032,000 ns · 2,113,536 B
5	Aniruddha Deb Expert	4,033	CPP g++13.3.0	Nov 16, 2025 00:20 43,582,735 ns · 17,139,000 ns · 1,008,000 ns · 2,433,024 B
6	Aleksei Shahoika Skilled	4,078	CPP clang++18.1.3	May 17, 2026 20:54 28,817,035 ns · 17,302,000 ns · 1,052,000 ns · 2,113,536 B
7	limanjun99 Expert	4,093	CPP g++13.3.0	Apr 11, 2026 11:22 39,937,950 ns · 17,396,000 ns · 1,023,000 ns · 2,289,664 B
8	M-Rochat Expert	4,168	CPP g++13.3.0	May 21, 2026 22:32 28,008,961 ns · 17,690,000 ns · 1,070,000 ns · 2,113,536 B
9	Josu San Martin Master	4,454	CPP g++14.2.0	May 12, 2026 03:23 30,376,575 ns · 20,045,000 ns · 0 ns · 2,117,632 B
10	olliecrow Expert	4,668	CPP clang++18.1.3	May 5, 2026 01:42 40,660,163 ns · 19,892,000 ns · 1,115,000 ns · 2,555,904 B
11	TudyM Skilled	4,874	CPP clang++18.1.3	Apr 28, 2026 09:57 43,323,422 ns · 19,943,000 ns · 1,994,000 ns · 2,383,872 B
12	Dominique Garmier Expert	5,042	ZIG 0.13.0	Mar 26, 2026 10:36 47,934,975 ns · 21,658,000 ns · 1,031,000 ns · 2,416,640 B
13	Alex Kent Apprentice	5,083	CPP g++13.2.0	Mar 31, 2025 15:13 50,541,523 ns · 21,879,000 ns · 994,000 ns · 2,396,160 B
14	Joad Nacer Expert	5,348	CPP clang++10.0.0	May 25, 2024 17:15 96,830,113 ns · 24,066,622 ns · 0 ns · 2,281,472 B
15	Keefe Skilled	5,780	CPP g++13.3.0	Mar 15, 2026 11:49 50,215,633 ns · 25,010,000 ns · 1,000,000 ns · 2,273,280 B
16	Shikhar Soni Skilled	5,808	CPP g++14.2.0	Jun 28, 2026 18:53 35,899,854 ns · 25,100,000 ns · 1,039,000 ns · 2,113,536 B
17	Charles Cabergs Skilled	5,947	CPP g++13.3.0	Apr 29, 2026 08:52 44,721,324 ns · 25,734,000 ns · 1,029,000 ns · 2,351,104 B
18	Ian Mckibben Skilled	7,615	CPP clang++18.1.3	Jan 20, 2025 23:19 55,802,777 ns · 34,269,000 ns · 0 ns · 2,428,928 B
19	Mikhail Shirokov Skilled	7,708	CPP clang++18.1.3	Dec 20, 2024 09:59 61,988,844 ns · 33,665,000 ns · 1,020,000 ns · 2,363,392 B
20	NoSIMD_C# Skilled	9,447	CPP clang++18.1.3	Feb 3, 2025 05:39 64,524,366 ns · 42,512,000 ns · 0 ns · 2,506,752 B
21	Tejas G. Apprentice	10,245	CPP g++13.3.0	Sep 23, 2025 06:42 69,758,485 ns · 45,099,000 ns · 1,002,000 ns · 2,273,280 B
22	Ilya Aniskovets Skilled	10,443	CPP g++9.3.0	Oct 16, 2021 07:35 113,886,394 ns · 46,991,915 ns · 0 ns · 2,256,896 B
23	gchebanov Skilled	12,351	CPP g++9.3.0	Jul 20, 2023 15:28 244,061,898 ns · 23,514,000 ns · 32,064,000 ns · 29,683,712 B
24	Bernard Teo Skilled	12,619	CPP g++9.3.0	May 21, 2023 17:55 249,344,959 ns · 15,000,000 ns · 41,786,000 ns · 29,564,928 B
25	Sergey Stremin Skilled	14,098	RUST rust-1.56.1	Nov 7, 2021 20:26 249,642,478 ns · 30,663,000 ns · 32,777,000 ns · 29,634,560 B
26	Yehor Bondar Skilled	14,266	CPP clang++18.1.3	Jan 2, 2026 17:40 88,868,367 ns · 62,191,000 ns · 2,006,000 ns · 2,506,752 B
27	Ben Skilled	14,456	CPP g++14.2.0	Apr 22, 2026 13:16 83,522,167 ns · 37,030,000 ns · 28,023,000 ns · 2,326,528 B
28	Yurkov Aleksey Skilled	16,020	CPP g++9.3.0	Oct 15, 2021 23:43 257,567,910 ns · 34,677,000 ns · 37,415,000 ns · 29,630,464 B
29	E Sequeira Skilled	16,599	CPP clang++18.1.3	Dec 10, 2024 15:04 271,850,558 ns · 45,967,000 ns · 28,729,000 ns · 29,552,640 B
30	Jörn Horstmann Apprentice	18,942	RUST rust-1.70.0	Jul 5, 2023 20:29 279,307,982 ns · 54,341,000 ns · 30,900,000 ns · 29,622,272 B
31	AnSa Skilled	19,070	CPP clang++18.1.3	Sep 3, 2024 16:41 283,061,821 ns · 50,853,000 ns · 34,961,000 ns · 29,630,464 B
32	A_Shaman Skilled	23,043	CPP g++10.5.0	Jul 2, 2026 17:09 113,001,440 ns · 89,160,000 ns · 14,537,000 ns · 2,113,536 B
33	Andrey Likhachev Skilled	25,302	RUST rust-1.86.0	Apr 8, 2025 12:31 137,657,701 ns · 112,860,000 ns · 998,000 ns · 2,461,696 B
34	Andrey Tsvetkov Skilled	25,737	GO go1.17.2	Oct 11, 2021 05:34 306,184,962 ns · 83,473,000 ns · 32,345,000 ns · 29,732,864 B
35	JulesPrieux Novice	29,824	RUST rust-1.92.0	Dec 22, 2025 22:15 162,657,913 ns · 120,187,000 ns · 14,021,000 ns · 2,289,664 B
36	tirochkin Novice	40,556	GO go1.17.2	Oct 11, 2021 11:13 358,658,782 ns · 125,229,000 ns · 57,275,000 ns · 29,630,464 B
37	Vitaliy F. Apprentice	43,013	GO go1.17.3	Nov 24, 2021 02:21 398,883,842 ns · 155,893,000 ns · 37,665,000 ns · 29,675,520 B
38	Genos0 Novice	76,716	CPP g++10.5.0	Jul 10, 2026 18:27 354,778,829 ns · 329,184,000 ns · 16,041,000 ns · 2,113,536 B
39	Kither Novice	76,759	CPP g++10.5.0	May 12, 2026 13:04 354,356,451 ns · 330,372,000 ns · 15,044,000 ns · 2,113,536 B
40	Andrey Kashenin Novice	76,864	CPP g++10.5.0	May 13, 2026 13:40 355,706,557 ns · 330,836,000 ns · 15,054,000 ns · 2,113,536 B
41	f0xeri Apprentice	76,948	CPP g++10.5.0	Jul 3, 2026 02:43 355,642,819 ns · 330,237,000 ns · 16,033,000 ns · 2,113,536 B
42	Tony Apprentice	77,890	CPP g++10.5.0	Jul 31, 2026 06:15 360,389,999 ns · 334,414,000 ns · 16,092,000 ns · 2,113,536 B
43	джулис Apprentice	99,198	GO go1.22.4	Jun 14, 2024 21:07 517,651,431 ns · 446,391,538 ns · 0 ns · 2,256,896 B
44	izotoff Skilled	100,022	GO go1.25.4	Nov 14, 2025 13:16 469,477,443 ns · 449,097,000 ns · 1,000,000 ns · 2,392,064 B
45	Pavel Apprentice	103,035	GO go1.20.7	Aug 11, 2023 03:21 645,537,489 ns · 432,480,000 ns · 31,178,000 ns · 29,794,304 B
46	Huy Duc Le Skilled	109,130	GO go1.22.1	Mar 6, 2024 10:59 682,319,359 ns · 444,218,000 ns · 46,867,000 ns · 29,659,136 B
47	Liam Skilled	109,882	GO go1.20.1	Feb 15, 2023 23:12 695,272,485 ns · 441,172,000 ns · 53,296,000 ns · 29,732,864 B
48	parsersmail Apprentice	109,890	GO go1.20.7	Aug 10, 2023 05:49 685,480,240 ns · 444,464,000 ns · 50,039,000 ns · 29,732,864 B
49	t Novice	109,990	GO go1.20.1	Mar 6, 2023 22:37 678,584,989 ns · 453,711,000 ns · 41,246,000 ns · 29,569,024 B
50	Oleg Kovalov Skilled	110,113	GO go1.21.5	Dec 11, 2023 15:09 683,984,100 ns · 449,815,000 ns · 45,692,000 ns · 29,667,328 B
51	Chandrasekaran Akash Skilled	113,205	GO go1.24.2	Apr 18, 2025 00:02 533,276,598 ns · 487,448,000 ns · 21,975,000 ns · 2,326,528 B
52	Taylor Dettling Skilled	143,118	RUST rust-1.95.0	Apr 21, 2026 01:28 661,577,533 ns · 633,035,000 ns · 11,000,000 ns · 2,281,472 B
53	Neko with ears Novice	416,740	CSHARP 8.0.16	May 16, 2025 08:09 1,905,002,345 ns · 1,848,353,000 ns · 26,975,000 ns · 2,347,008 B
54	Alexander Kim Apprentice	451,118	GO go1.17.5	Dec 25, 2021 05:03 2,097,148,622 ns · 2,030,031,156 ns · 0 ns · 2,310,144 B
55	Robert Burke Skilled	457,630	GO go1.18.4	Aug 22, 2022 17:48 2,117,509,494 ns · 2,059,333,172 ns · 0 ns · 2,269,184 B
56	Eugene Zhydzetski Skilled	469,116	GO go1.19	Aug 22, 2022 17:46 2,175,925,932 ns · 2,111,020,322 ns · 0 ns · 2,215,936 B

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