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	1:20.1.2-0ubuntu1~24.04.2	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.

Date	Author	Language	Status	Score
Feb 22, 2026 04:59	olliecrow	CPPclang++18.1.3	Success	8,248+0.44 RP
Feb 22, 2026 04:58	olliecrow	CPPclang++18.1.3	Success	8,251+1.03 RP
Feb 22, 2026 04:49	olliecrow	CPPclang++18.1.8	Success	8,258+4.67 RP
Feb 22, 2026 04:45	olliecrow	CPPclang++18.1.8	Success	9,645
Feb 22, 2026 04:44	olliecrow	CPPclang++18.1.8	Success	8,444
Feb 22, 2026 04:40	olliecrow	CPPclang++18.1.8	Success	8,290+4.78 RP
Feb 22, 2026 04:38	olliecrow	CPPclang++18.1.8	Success	8,414
Feb 22, 2026 04:36	olliecrow	CPPclang++18.1.8	Success	8,323+140.03 RP
Feb 22, 2026 04:33	olliecrow	CPPclang++18.1.8	Success	9,463
Feb 22, 2026 04:21	olliecrow	CPPclang++18.1.8	Success	9,421+0.34 RP
Feb 22, 2026 04:09	olliecrow	CPPclang++18.1.8	Success	9,454
Feb 22, 2026 04:06	olliecrow	CPPclang++18.1.8	Success	9,658
Feb 22, 2026 04:00	olliecrow	CPPclang++18.1.8	Success	9,424+125.14 RP
Feb 22, 2026 03:48	olliecrow	CPPg++13.3.0	Error
Feb 22, 2026 03:42	olliecrow	CPPg++13.3.0	Success	10,684+1.66 RP
Feb 22, 2026 03:37	olliecrow	CPPg++13.3.0	Success	25,964
Feb 22, 2026 03:29	olliecrow	CPPg++13.3.0	Success	21,512
Feb 22, 2026 03:15	olliecrow	CPPg++13.3.0	Success	10,866
Feb 22, 2026 03:05	olliecrow	CPPg++13.3.0	Success	10,703+1.92 RP
Feb 22, 2026 03:00	olliecrow	CPPg++13.3.0	Success	10,725+6.30 RP
Feb 22, 2026 02:50	olliecrow	CPPg++13.3.0	Success	10,798+1.37 RP
Feb 22, 2026 02:47	olliecrow	CPPg++13.3.0	Success	10,814+43.98 RP
Feb 22, 2026 02:38	olliecrow	CPPg++13.3.0	Success	26,554
Feb 22, 2026 02:34	olliecrow	CPPg++13.3.0	Success	11,354+99.37 RP
Feb 22, 2026 02:26	olliecrow	CPPg++13.3.0	Success	12,798+141.49 RP
Feb 22, 2026 02:24	olliecrow	CPPg++13.3.0	Error
Feb 22, 2026 02:20	olliecrow	CPPclang++18.1.3	Success	19,689
Feb 22, 2026 02:18	olliecrow	CPPg++13.3.0	Success	17,257
Feb 22, 2026 02:16	olliecrow	CPPg++13.3.0	Success	15,640
Feb 22, 2026 02:13	olliecrow	CPPg++13.3.0	Success	15,628+135.13 RP
Feb 22, 2026 02:09	olliecrow	CPPclang++18.1.3	Error
Feb 22, 2026 02:06	olliecrow	CPPclang++18.1.3	Success	19,812+53.13 RP
Feb 22, 2026 02:04	olliecrow	CPPclang++18.1.3	Error
Feb 22, 2026 02:03	olliecrow	CPPclang++18.1.3	Success	22,143+451.61 RP
Feb 22, 2026 02:02	olliecrow	CPPclang++18.1.3	Error
Feb 22, 2026 02:00	olliecrow	CPPclang++18.1.3	Error
Feb 22, 2026 01:58	olliecrow	CPPclang++18.1.3	Error
Feb 22, 2026 01:57	olliecrow	CPPclang++18.1.3	Error
Feb 22, 2026 01:55	olliecrow	CPPclang++18.1.3	Error
Feb 22, 2026 01:51	olliecrow	CPPg++13.3.0	Error
Feb 22, 2026 01:48	olliecrow	CPPclang++18.1.3	Error
Feb 22, 2026 01:45	olliecrow	CPPclang++18.1.3	Error
Feb 22, 2026 01:42	olliecrow	CPPclang++18.1.3	Error
Jan 2, 2026 17:40	Yehor Bondar	CPPclang++18.1.3	Success	14,266+586.37 RP
Jan 2, 2026 16:31	Yehor Bondar	GOgo1.25.5	Success	87,735
Dec 31, 2025 18:57	Keefe	CPPg++13.3.0	Error
Dec 31, 2025 17:40	Aniruddha Deb	CPPg++13.3.0	Success	4,042
Dec 31, 2025 17:21	Aniruddha Deb	CPPg++13.3.0	Error
Dec 31, 2025 17:13	Aniruddha Deb	CPPg++13.3.0	Success	10,030
Dec 31, 2025 17:08	Aniruddha Deb	CPPg++13.3.0	Success	4,198
Dec 31, 2025 17:03	Aniruddha Deb	CPPclang++18.1.3	Success	6,479
Dec 31, 2025 12:10	Aniruddha Deb	CPPg++13.3.0	Success	4,080
Dec 31, 2025 12:08	Aniruddha Deb	CPPg++13.3.0	Error
Dec 30, 2025 17:38	Yehor Bondar	GOgo1.25.5	Success	87,264+19.38 RP
Dec 30, 2025 17:18	Yehor Bondar	GOgo1.25.5	Error
Dec 30, 2025 17:13	Yehor Bondar	GOgo1.25.5	Error
Dec 30, 2025 02:26	Josu San Martin	RUSTrust-1.92.0	Success	7,087
Dec 30, 2025 02:20	Josu San Martin	RUSTrust-1.92.0	Success	10,532
Dec 30, 2025 02:19	Josu San Martin	RUSTrust-1.92.0	Success	11,213
Dec 30, 2025 02:04	Josu San Martin	RUSTrust-1.92.0	Success	7,252
Dec 30, 2025 02:02	Josu San Martin	RUSTrust-1.92.0	Success	6,687+1'881.41 RP
Dec 30, 2025 01:41	Josu San Martin	RUSTrust-1.92.0	Error
Dec 30, 2025 01:33	Josu San Martin	RUSTrust-1.92.0	Error
Dec 30, 2025 01:32	Josu San Martin	RUSTrust-1.92.0	Error
Dec 30, 2025 01:06	Josu San Martin	RUSTrust-1.92.0	Success	24,991+147.82 RP
Dec 30, 2025 01:06	Josu San Martin	RUSTrust-1.92.0	Success	39,631+252.33 RP
Dec 29, 2025 15:53	Josu San Martin	RUSTrust-1.92.0	Error
Dec 29, 2025 15:51	Josu San Martin	RUSTrust-1.92.0	Error
Dec 29, 2025 15:49	Josu San Martin	RUSTrust-1.92.0	Error
Dec 22, 2025 22:20	JulesPrieux	RUSTrust-1.92.0	Error
Dec 22, 2025 22:19	JulesPrieux	RUSTrust-1.92.0	Error
Dec 22, 2025 22:15	JulesPrieux	RUSTrust-1.92.0	Success	29,824+229.99 RP
Dec 22, 2025 22:10	JulesPrieux	RUSTrust-1.92.0	Error
Dec 22, 2025 22:09	JulesPrieux	RUSTrust-1.92.0	Success	99,000
Dec 22, 2025 21:59	JulesPrieux	RUSTrust-1.92.0	Success	94,954+96.69 RP
Dec 22, 2025 21:50	JulesPrieux	RUSTrust-1.92.0	Error
Dec 22, 2025 21:46	JulesPrieux	RUSTrust-1.92.0	Error
Dec 22, 2025 21:44	JulesPrieux	RUSTrust-1.92.0	Error
Dec 22, 2025 21:40	JulesPrieux	RUSTrust-1.92.0	Error
Dec 22, 2025 21:13	JulesPrieux	GOgo1.25.5	Success	1,160,029+8.62 RP
Dec 5, 2025 02:56	Yehor Bondar	GOgo1.25.5	Success	105,029+95.21 RP
Nov 19, 2025 18:09	Yuriy Lyfenko	CPPg++13.3.0	Success	3,012
Nov 19, 2025 18:08	Yuriy Lyfenko	CPPg++13.3.0	Success	3,005
Nov 16, 2025 00:20	Aniruddha Deb	CPPg++13.3.0	Success	4,033+595.24 RP
Nov 16, 2025 00:09	Aniruddha Deb	CPPg++13.3.0	Success	5,661
Nov 16, 2025 00:07	Aniruddha Deb	CPPg++13.3.0	Success	5,528
Nov 16, 2025 00:01	Aniruddha Deb	CPPg++13.3.0	Success	5,307+1.06 RP
Nov 16, 2025 00:00	Aniruddha Deb	CPPg++13.3.0	Success	5,628
Nov 15, 2025 23:50	Aniruddha Deb	CPPg++13.3.0	Success	8,317
Nov 15, 2025 23:48	Aniruddha Deb	CPPg++13.3.0	Success	5,669
Nov 15, 2025 23:46	Aniruddha Deb	CPPg++13.3.0	Success	5,669
Nov 15, 2025 23:46	Aniruddha Deb	CPPg++13.3.0	Success	5,690
Nov 15, 2025 23:44	Aniruddha Deb	CPPg++13.3.0	Success	5,754
Nov 15, 2025 23:44	Aniruddha Deb	CPPg++13.3.0	Success	5,467
Nov 15, 2025 23:36	Aniruddha Deb	CPPg++13.3.0	Success	5,310+14.78 RP
Nov 15, 2025 23:33	Aniruddha Deb	CPPg++13.3.0	Success	5,352+118.99 RP
Nov 15, 2025 23:29	Aniruddha Deb	CPPclang++18.1.3	Success	7,975
Nov 14, 2025 14:11	izotoff	GOgo1.24.4	Success	101,719
Nov 14, 2025 14:09	izotoff	GOgo1.24.4	Success	101,489
Nov 14, 2025 14:08	izotoff	GOgo1.18	Success	450,289

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