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.

Back to listApr 14, 2026 00:32

Josu San MartinScore: 4,537Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Apr 14, 2026 00:32	4,503	44,646,711	18,236,000	2,026,000	2,281,472
2	Apr 14, 2026 00:32	4,507	44,209,777	19,266,000	1,014,000	2,445,312
3	Apr 14, 2026 00:32	4,510	43,486,274	19,279,000	1,014,000	2,281,472
4	Apr 14, 2026 01:29	4,512	42,462,083	19,290,000	1,015,000	2,445,312
5	Apr 14, 2026 00:32	4,515	39,998,040	19,301,000	1,015,000	2,281,472
6	Apr 15, 2026 03:09	4,517	49,145,738	19,310,000	1,016,000	2,277,376
7	Apr 14, 2026 00:32	4,518	52,409,730	19,314,000	1,016,000	2,281,472
8	Apr 14, 2026 00:32	4,518	43,818,908	19,317,000	1,016,000	2,277,376
9	Apr 14, 2026 01:29	4,521	40,738,152	19,328,000	1,017,000	2,277,376
10	Apr 14, 2026 00:32	4,522	44,725,633	19,330,000	1,017,000	2,445,312
11	Apr 14, 2026 00:32	4,530	41,129,263	19,367,000	1,019,000	2,441,216
12	Apr 14, 2026 00:32	4,533	41,699,596	19,380,000	1,020,000	2,441,216
13	Apr 15, 2026 03:09	4,534	41,782,239	19,381,000	1,020,000	2,281,472
14	Apr 14, 2026 00:32	4,534	45,719,811	19,381,000	1,020,000	2,445,312
15	Apr 14, 2026 00:32	4,535	40,221,489	19,387,000	1,020,000	2,281,472
16	Apr 14, 2026 00:32	4,536	40,723,071	19,391,000	1,020,000	2,445,312
17	Apr 14, 2026 00:32	4,536	48,498,704	19,394,000	1,020,000	2,281,472
18	Apr 14, 2026 00:32	4,537	43,134,293	19,396,000	1,020,000	2,281,472
19	Apr 14, 2026 00:32	4,537	51,766,870	19,395,000	1,020,000	2,281,472
20	Apr 14, 2026 00:32	4,537	41,887,991	19,396,000	1,020,000	2,281,472
21	Apr 14, 2026 00:32	4,540	43,227,459	19,409,000	1,021,000	2,445,312
22	Apr 14, 2026 00:32	4,545	42,172,390	19,430,000	1,022,000	2,281,472
23	Apr 14, 2026 00:32	4,546	35,310,860	19,435,000	1,022,000	2,523,136
24	Apr 14, 2026 00:32	4,550	42,685,537	19,451,000	1,023,000	2,277,376
25	Apr 14, 2026 01:29	4,550	52,299,440	19,454,000	1,023,000	2,281,472
26	Apr 14, 2026 00:32	4,550	43,406,443	19,451,000	1,023,000	2,445,312
27	Apr 14, 2026 00:32	4,550	49,044,762	19,450,000	1,023,000	2,441,216
28	Apr 14, 2026 00:32	4,553	48,492,121	20,487,000	0	2,445,312
29	Apr 14, 2026 00:32	4,554	38,424,613	19,468,000	1,024,000	2,277,376
30	Apr 15, 2026 03:09	4,569	48,078,967	19,533,000	1,028,000	2,281,472
31	Apr 14, 2026 00:32	4,571	38,581,328	20,570,000	0	2,453,504
32	Apr 14, 2026 00:32	4,572	50,301,538	19,544,000	1,028,000	2,281,472
33	Apr 14, 2026 00:32	4,576	45,851,494	19,565,000	1,029,000	2,281,472
34	Apr 14, 2026 00:32	4,591	48,803,446	19,628,000	1,033,000	2,281,472
35	Apr 14, 2026 00:32	4,642	48,342,213	18,902,000	1,989,000	2,281,472
36	Apr 14, 2026 00:32	4,653	48,038,149	18,945,000	1,994,000	2,281,472

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