Parse JSON

Compute the total amount of non-canceled external USD transactions from a stream of JSON records as fast as possible.

Input: 1 000 000 JSON records on STDIN, one per line. Each record has the following structure:

{
    "user_id": 0,
    "currency": "USD",
    "transactions": [
        {
            "amount": 0,
            "to_user_id": 0,
            "canceled": false
        }
    ]
}

Field	Constraints
`user_id`	Integer, max 10 000
`currency`	One of `"GBP"`, `"USD"`, `"RUB"`, `"JPY"`, `"CHF"`
`transactions`	Array, max 10 elements
`amount`	Integer, max 1000
`canceled`	Boolean; may be omitted when `false`

Field order is not guaranteed within any object.

Output: The total amount of all transactions where:

record.currency == "USD"
transaction.to_user_id != record.user_id (external)
transaction.canceled is false or absent

Restrictions:60s512Mb 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 listMar 30, 2026 04:15

olliecrowScore: 3,170Success

Source Code

Source code access is restricted. Log in to request access.

Challenge History

No challenges yet.

Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 30, 2026 04:22	3,145	59,412,272	33,573,000	1,017,000	2,392,064
2	Mar 30, 2026 04:21	3,149	59,684,399	34,641,000	0	2,277,376
3	Mar 30, 2026 04:18	3,151	66,669,497	33,645,000	1,019,000	2,404,352
4	Mar 30, 2026 04:16	3,153	58,805,847	34,682,000	0	2,404,352
5	Mar 30, 2026 04:18	3,153	63,392,995	33,663,000	1,020,000	2,277,376
6	Mar 30, 2026 04:28	3,153	65,502,221	33,666,000	1,020,000	2,277,376
7	Mar 30, 2026 04:23	3,165	62,162,200	32,822,000	1,989,000	2,396,160
8	Mar 30, 2026 04:19	3,165	64,086,880	32,831,000	1,989,000	2,396,160
9	Mar 30, 2026 04:22	3,165	61,630,965	33,819,000	994,000	2,277,376
10	Mar 30, 2026 04:26	3,167	62,908,949	32,848,000	1,990,000	2,277,376
11	Mar 30, 2026 04:20	3,167	62,246,330	33,842,000	995,000	2,277,376
12	Mar 30, 2026 04:19	3,167	64,670,747	33,846,000	995,000	2,277,376
13	Mar 30, 2026 04:22	3,167	62,907,441	33,838,000	995,000	2,277,376
14	Mar 30, 2026 04:24	3,167	61,307,004	32,851,000	1,991,000	2,400,256
15	Mar 30, 2026 04:22	3,168	66,002,013	33,850,000	995,000	2,400,256
16	Mar 30, 2026 04:18	3,168	62,517,557	33,858,000	995,000	2,281,472
17	Mar 30, 2026 04:14	3,168	63,212,729	32,857,000	1,991,000	2,404,352
18	Mar 30, 2026 04:19	3,168	59,370,404	33,850,000	995,000	2,277,376
19	Mar 30, 2026 04:15	3,168	67,857,993	34,844,000	0	2,400,256
20	Mar 30, 2026 04:17	3,168	65,699,745	32,859,000	1,991,000	2,400,256
21	Mar 30, 2026 04:24	3,168	63,423,757	33,858,000	995,000	2,396,160
22	Mar 30, 2026 04:16	3,169	61,352,254	32,867,000	1,991,000	2,277,376
23	Mar 30, 2026 04:14	3,169	60,475,193	33,862,000	995,000	2,277,376
24	Mar 30, 2026 04:14	3,169	62,148,662	32,869,000	1,992,000	2,277,376
25	Mar 30, 2026 04:22	3,169	62,352,248	34,858,000	0	2,277,376
26	Mar 30, 2026 04:15	3,169	65,903,670	33,866,000	996,000	2,277,376
27	Mar 30, 2026 04:19	3,169	59,011,419	32,867,000	1,991,000	2,277,376
28	Mar 30, 2026 04:16	3,170	62,011,994	33,870,000	996,000	2,277,376
29	Mar 30, 2026 04:19	3,170	58,697,433	34,872,000	0	2,408,448
30	Mar 30, 2026 04:21	3,170	60,037,420	32,880,000	1,992,000	2,404,352
31	Mar 30, 2026 04:17	3,171	62,025,234	33,857,000	1,025,000	2,277,376
32	Mar 30, 2026 04:24	3,171	60,734,932	33,855,000	1,025,000	2,482,176
33	Mar 30, 2026 04:23	3,172	61,158,173	33,867,000	1,026,000	2,404,352
34	Mar 30, 2026 04:26	3,172	60,417,187	34,895,000	0	2,392,064
35	Mar 30, 2026 04:21	3,172	57,774,567	32,896,000	1,993,000	2,277,376
36	Mar 30, 2026 04:28	3,173	55,218,655	32,908,000	1,994,000	2,400,256
37	Mar 30, 2026 04:24	3,173	58,337,932	32,906,000	1,994,000	2,392,064
38	Mar 30, 2026 04:20	3,174	58,755,698	32,921,000	1,995,000	2,277,376
39	Mar 30, 2026 04:21	3,174	61,072,497	33,913,000	997,000	2,277,376
40	Mar 30, 2026 04:17	3,174	60,011,536	33,912,000	997,000	2,277,376
41	Mar 30, 2026 04:18	3,174	58,715,841	32,921,000	1,995,000	2,277,376
42	Mar 30, 2026 04:19	3,174	57,937,346	32,915,000	1,994,000	2,396,160
43	Mar 30, 2026 04:24	3,176	63,086,678	32,941,000	1,996,000	2,400,256
44	Mar 30, 2026 04:22	3,176	59,860,602	32,936,000	1,996,000	2,277,376
45	Mar 30, 2026 04:21	3,177	61,227,568	32,948,000	1,996,000	2,400,256
46	Mar 30, 2026 04:18	3,178	62,158,581	32,963,000	1,997,000	2,277,376
47	Mar 30, 2026 04:28	3,178	57,666,466	33,958,000	998,000	2,400,256
48	Mar 30, 2026 04:15	3,179	56,868,028	32,969,000	1,998,000	2,277,376
49	Mar 30, 2026 04:15	3,179	58,863,033	33,973,000	999,000	2,277,376
50	Mar 30, 2026 04:18	3,180	58,585,916	33,979,000	999,000	2,404,352
51	Mar 30, 2026 04:20	3,181	56,884,763	33,990,000	999,000	2,277,376
52	Mar 30, 2026 04:15	3,184	58,563,745	34,021,000	1,000,000	2,396,160
53	Mar 30, 2026 04:21	3,185	60,990,306	33,036,000	2,002,000	2,396,160
54	Mar 30, 2026 04:23	3,186	59,711,923	33,044,000	2,002,000	2,392,064
55	Mar 30, 2026 04:24	3,186	63,974,313	34,041,000	1,001,000	2,269,184
56	Mar 30, 2026 04:26	3,187	65,420,925	33,055,000	2,003,000	2,281,472
57	Mar 30, 2026 04:15	3,188	56,448,761	34,070,000	1,002,000	2,400,256

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