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 00:06

olliecrowScore: 3,169Success

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 00:14	3,150	60,717,992	33,633,000	1,019,000	2,277,376
2	Mar 30, 2026 00:12	3,151	62,659,163	33,646,000	1,019,000	2,277,376
3	Mar 30, 2026 00:14	3,152	64,737,331	33,658,000	1,019,000	2,277,376
4	Mar 30, 2026 00:09	3,154	62,626,777	33,676,000	1,020,000	2,400,256
5	Mar 30, 2026 00:07	3,154	65,086,726	34,698,000	0	2,404,352
6	Mar 30, 2026 00:09	3,155	58,541,544	33,680,000	1,020,000	2,277,376
7	Mar 30, 2026 00:08	3,155	62,978,596	33,686,000	1,020,000	2,400,256
8	Mar 30, 2026 00:12	3,155	60,563,400	34,709,000	0	2,396,160
9	Mar 30, 2026 00:04	3,156	59,998,953	33,697,000	1,021,000	2,277,376
10	Mar 30, 2026 00:04	3,163	62,801,408	32,810,000	1,988,000	2,277,376
11	Mar 30, 2026 00:14	3,164	61,401,800	33,808,000	994,000	2,277,376
12	Mar 30, 2026 00:11	3,165	64,815,738	32,828,000	1,989,000	2,277,376
13	Mar 30, 2026 00:02	3,166	60,620,824	34,831,000	0	2,277,376
14	Mar 30, 2026 00:09	3,167	60,098,315	33,842,000	995,000	2,277,376
15	Mar 30, 2026 00:12	3,167	59,752,846	33,845,000	995,000	2,396,160
16	Mar 30, 2026 00:04	3,167	64,428,944	33,846,000	995,000	2,277,376
17	Mar 30, 2026 00:03	3,168	60,374,481	32,857,000	1,991,000	2,277,376
18	Mar 30, 2026 00:05	3,168	64,934,813	32,854,000	1,991,000	2,482,176
19	Mar 30, 2026 00:13	3,168	60,382,136	33,855,000	995,000	2,277,376
20	Mar 30, 2026 00:07	3,168	59,679,932	33,858,000	995,000	2,277,376
21	Mar 30, 2026 00:07	3,168	64,699,404	32,858,000	1,991,000	2,277,376
22	Mar 30, 2026 00:11	3,168	62,063,575	32,857,000	1,991,000	2,277,376
23	Mar 30, 2026 00:04	3,168	61,435,599	33,857,000	995,000	2,486,272
24	Mar 30, 2026 00:11	3,168	65,938,075	32,860,000	1,991,000	2,396,160
25	Mar 30, 2026 00:11	3,168	60,290,900	33,851,000	995,000	2,277,376
26	Mar 30, 2026 00:11	3,168	60,217,728	32,858,000	1,991,000	2,277,376
27	Mar 30, 2026 00:07	3,169	68,546,115	32,865,000	1,991,000	2,277,376
28	Mar 30, 2026 00:03	3,169	59,937,609	33,861,000	995,000	2,277,376
29	Mar 30, 2026 00:08	3,169	60,842,773	33,865,000	996,000	2,277,376
30	Mar 30, 2026 00:07	3,169	65,083,931	33,861,000	995,000	2,400,256
31	Mar 30, 2026 00:05	3,169	60,586,744	32,868,000	1,992,000	2,400,256
32	Mar 30, 2026 00:10	3,170	62,148,113	32,883,000	1,992,000	2,404,352
33	Mar 30, 2026 00:02	3,170	60,954,154	33,871,000	996,000	2,277,376
34	Mar 30, 2026 00:12	3,170	60,296,707	33,874,000	996,000	2,277,376
35	Mar 30, 2026 00:12	3,170	63,812,871	33,876,000	996,000	2,277,376
36	Mar 30, 2026 00:09	3,170	67,781,958	34,865,000	0	2,486,272
37	Mar 30, 2026 00:08	3,170	64,443,069	32,879,000	1,992,000	2,277,376
38	Mar 30, 2026 00:06	3,171	61,319,964	32,887,000	1,993,000	2,404,352
39	Mar 30, 2026 00:08	3,172	57,381,367	32,895,000	1,993,000	2,392,064
40	Mar 30, 2026 00:07	3,173	56,410,201	32,908,000	1,994,000	2,277,376
41	Mar 30, 2026 00:14	3,174	57,688,296	32,916,000	1,994,000	2,400,256
42	Mar 30, 2026 00:13	3,174	56,323,507	32,916,000	1,994,000	2,408,448
43	Mar 30, 2026 00:09	3,175	58,107,773	33,931,000	997,000	2,269,184
44	Mar 30, 2026 00:02	3,176	58,391,364	32,940,000	1,996,000	2,392,064
45	Mar 30, 2026 00:10	3,177	56,663,421	33,950,000	998,000	2,400,256
46	Mar 30, 2026 00:04	3,177	62,481,288	32,949,000	1,996,000	2,404,352
47	Mar 30, 2026 00:12	3,177	56,035,731	33,944,000	998,000	2,519,040
48	Mar 30, 2026 00:05	3,177	58,179,927	33,946,000	998,000	2,277,376
49	Mar 30, 2026 00:14	3,180	57,953,919	32,984,000	1,999,000	2,277,376
50	Mar 30, 2026 00:06	3,180	58,398,630	32,978,000	1,998,000	2,404,352
51	Mar 30, 2026 00:13	3,181	58,729,355	33,988,000	999,000	2,277,376
52	Mar 30, 2026 00:06	3,182	59,768,554	33,005,000	2,000,000	2,392,064
53	Mar 30, 2026 00:14	3,182	65,600,718	33,006,000	2,000,000	2,273,280
54	Mar 30, 2026 00:09	3,182	58,019,028	34,003,000	1,000,000	2,510,848
55	Mar 30, 2026 00:04	3,183	62,534,716	33,011,000	2,000,000	2,400,256
56	Mar 30, 2026 00:08	3,183	60,973,074	34,012,000	1,000,000	2,277,376
57	Mar 30, 2026 00:10	3,185	55,381,812	33,031,000	2,001,000	2,277,376
58	Mar 30, 2026 00:03	3,186	58,035,979	34,040,000	1,001,000	2,486,272
59	Mar 30, 2026 00:11	3,188	56,756,663	34,070,000	1,002,000	2,396,160
60	Mar 30, 2026 00:08	3,190	58,134,123	33,089,000	2,005,000	2,277,376

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