Order book

Simulate a sell-side order book and calculate the cost of a final purchase as fast as possible.

Input

1,000,000 order updates on STDIN, one per line:

+ <price> <size> – add a new sell order
- <position> – delete the order at the given position
= <size> – buy <size> shares from the top of the order book

After all updates are processed, buy 1,000 shares from the top of the order book.

Output

Print the total cost of the final 1,000-share purchase to STDOUT.

Order Book Rules

Orders are sorted by price ascending (lower is better). Orders at the same price are sorted by arrival time (earlier first). Position 0 is the best (lowest-price) offer.

The = (buy) operation consumes shares starting from position 0. If an order is fully consumed, it is removed from the book.

Example

Input	Order book state
`+ 1137 100`	(1137,100)
`+ 1130 10`	(1130,10), (1137,100)
`+ 1130 50`	(1130,10), (1130,50), (1137,100)
`- 0`	(1130,50), (1137,100)
`+ 1150 200`	(1130,50), (1137,100), (1150,200)
`= 200`	(1150,150)

Total cost of the last buy: 50 * 1130 + 100 * 1137 + 50 * 1150.

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 listMar 26, 2024 16:31

E Sequeira

Score: 85,021

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 26, 2024 16:31	84,250	79,701,692	48,865,000	0	2,510,848
2	Mar 26, 2024 16:36	84,274	75,259,508	47,882,000	997,000	2,510,848
3	Mar 26, 2024 16:35	84,278	78,273,001	46,886,000	1,995,000	2,506,752
4	Mar 26, 2024 16:33	84,293	73,435,543	46,895,000	1,995,000	2,510,848
5	Mar 26, 2024 16:35	84,321	78,280,025	46,910,000	1,996,000	2,289,664
6	Mar 26, 2024 16:31	84,329	75,513,434	46,915,000	1,996,000	2,293,760
7	Mar 26, 2024 16:35	84,371	73,003,399	46,938,000	1,997,000	2,269,184
8	Mar 26, 2024 16:36	84,390	73,851,118	47,948,000	998,000	2,285,568
9	Mar 26, 2024 16:32	84,484	70,576,413	47,001,000	2,000,000	2,289,664
10	Mar 26, 2024 16:32	84,486	72,608,996	47,002,000	2,000,000	2,289,664
11	Mar 26, 2024 16:33	84,536	70,476,776	47,030,000	2,001,000	2,347,008
12	Mar 26, 2024 16:35	84,552	72,421,449	47,039,000	2,001,000	2,510,848
13	Mar 26, 2024 16:36	84,553	79,237,873	47,040,000	2,001,000	2,289,664
14	Mar 26, 2024 16:31	84,553	72,684,618	47,040,000	2,001,000	2,289,664
15	Mar 26, 2024 16:31	84,605	76,765,753	48,070,000	1,001,000	2,289,664
16	Mar 26, 2024 16:35	84,609	71,136,687	47,070,000	2,003,000	2,289,664
17	Mar 26, 2024 16:36	84,610	70,794,094	47,071,000	2,003,000	2,289,664
18	Mar 26, 2024 16:33	84,643	70,545,713	47,090,000	2,003,000	2,514,944
19	Mar 26, 2024 16:32	84,667	71,581,025	48,105,000	1,002,000	2,510,848
20	Mar 26, 2024 16:33	84,676	76,008,406	47,108,000	2,004,000	2,510,848
21	Mar 26, 2024 16:35	84,678	71,894,648	48,111,000	1,002,000	2,510,848
22	Mar 26, 2024 16:31	84,690	71,750,786	47,116,000	2,004,000	2,289,664
23	Mar 26, 2024 16:32	84,702	71,473,216	47,122,000	2,005,000	2,519,040
24	Mar 26, 2024 16:31	84,748	106,466,552	49,153,910	0	2,224,128
25	Mar 26, 2024 16:35	84,753	76,675,536	47,151,000	2,006,000	2,289,664
26	Mar 26, 2024 16:36	84,805	104,788,715	49,187,057	0	2,215,936
27	Mar 26, 2024 16:32	84,933	71,691,538	47,251,000	2,010,000	2,289,664
28	Mar 26, 2024 16:31	84,981	111,338,678	49,288,995	0	2,215,936
29	Mar 26, 2024 16:31	84,981	75,663,713	47,278,000	2,011,000	2,277,376
30	Mar 26, 2024 16:33	84,990	76,124,857	48,288,000	1,006,000	2,285,568
31	Mar 26, 2024 16:35	85,021	73,480,790	47,300,000	2,012,000	2,371,584
32	Mar 26, 2024 16:33	85,034	119,017,341	49,319,924	0	2,211,840
33	Mar 26, 2024 16:31	85,045	72,386,716	48,320,000	1,006,000	2,289,664
34	Mar 26, 2024 16:33	85,069	72,499,819	48,334,000	1,006,000	2,289,664
35	Mar 26, 2024 16:35	85,114	76,399,256	48,359,000	1,007,000	2,289,664
36	Mar 26, 2024 16:33	85,118	111,082,274	49,368,238	0	2,207,744
37	Mar 26, 2024 16:32	85,119	79,117,659	48,362,000	1,007,000	2,289,664
38	Mar 26, 2024 16:33	85,121	72,805,596	48,363,000	1,007,000	2,506,752
39	Mar 26, 2024 16:33	85,140	74,978,737	47,366,000	2,015,000	2,289,664
40	Mar 26, 2024 16:32	85,152	74,688,737	47,373,000	2,015,000	2,510,848
41	Mar 26, 2024 16:35	85,163	118,816,592	49,394,829	0	2,220,032
42	Mar 26, 2024 16:32	85,227	117,254,987	49,431,823	0	2,211,840
43	Mar 26, 2024 16:32	85,269	79,603,588	48,447,000	1,009,000	2,273,280
44	Mar 26, 2024 16:36	85,278	75,666,285	48,452,000	1,009,000	2,502,656
45	Mar 26, 2024 16:36	85,281	72,519,263	48,454,000	1,009,000	2,289,664
46	Mar 26, 2024 16:33	85,322	72,369,476	48,478,000	1,009,000	2,289,664
47	Mar 26, 2024 16:36	85,338	75,904,787	49,496,000	0	2,277,376
48	Mar 26, 2024 16:31	85,386	73,568,347	48,514,000	1,010,000	2,285,568
49	Mar 26, 2024 16:35	85,435	115,400,771	49,552,317	0	2,220,032
50	Mar 26, 2024 16:31	85,469	78,081,996	48,561,000	1,011,000	2,289,664
51	Mar 26, 2024 16:32	85,486	73,023,491	48,571,000	1,011,000	2,351,104
52	Mar 26, 2024 16:36	85,691	81,463,366	48,687,000	1,014,000	2,519,040
53	Mar 26, 2024 16:35	85,697	112,885,569	49,704,440	0	2,220,032
54	Mar 26, 2024 16:31	85,700	114,318,672	49,705,849	0	2,224,128
55	Mar 26, 2024 16:36	85,833	106,441,154	49,783,152	0	2,203,648
56	Mar 26, 2024 16:36	85,929	117,397,193	49,838,742	0	2,211,840
57	Mar 26, 2024 16:32	85,948	120,110,651	49,849,648	0	2,211,840
58	Mar 26, 2024 16:36	86,002	85,748,488	48,884,000	997,000	2,277,376
59	Mar 26, 2024 16:32	86,034	109,151,516	49,899,674	0	2,220,032
60	Mar 26, 2024 16:33	86,062	115,617,168	49,915,837	0	2,211,840

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