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 listOct 18, 2024 07:33

matsuoka-601

Score: 1,966,800

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Oct 18, 2024 07:01	19,083	32,990,677	10,062,000	1,006,000	2,424,832
2	Oct 17, 2024 12:58	19,412	28,478,952	9,212,000	2,047,000	2,420,736
3	Oct 18, 2024 07:33	20,245	32,710,656	11,742,000	0	2,535,424
4	Oct 17, 2024 12:58	20,831	31,651,801	10,069,000	2,013,000	2,424,832
5	Oct 18, 2024 07:34	21,684	31,331,473	11,529,000	1,048,000	2,535,424
6	Oct 17, 2024 12:58	21,762	30,127,156	11,571,000	1,051,000	2,535,424
7	Oct 18, 2024 06:58	22,429	35,751,826	12,009,000	1,000,000	2,535,424
8	Oct 17, 2024 12:58	22,617	29,767,476	11,100,000	2,018,000	2,424,832
9	Oct 18, 2024 07:34	23,314	34,592,483	12,482,000	1,040,000	2,535,424
10	Oct 18, 2024 06:58	23,605	31,698,920	12,638,000	1,053,000	2,273,280
11	Oct 18, 2024 07:32	24,009	33,011,434	12,931,000	994,000	2,433,024
12	Oct 18, 2024 06:58	24,324	32,009,666	13,101,000	1,007,000	2,433,024
13	Oct 18, 2024 06:58	24,971	37,558,187	14,483,000	0	2,273,280
14	Oct 17, 2024 12:46	25,048	34,721,720	13,491,000	1,037,000	2,433,024
15	Oct 17, 2024 12:46	25,095	34,754,949	13,516,000	1,039,000	2,273,280
16	Oct 18, 2024 07:33	25,290	29,406,712	13,621,000	1,047,000	2,424,832
17	Oct 18, 2024 07:01	25,362	32,412,133	13,660,000	1,050,000	2,428,928
18	Oct 18, 2024 07:34	25,695	31,573,281	13,910,000	993,000	2,273,280
19	Oct 17, 2024 12:58	26,453	31,594,101	14,321,000	1,022,000	2,273,280
20	Oct 18, 2024 07:34	1,955,352	1,159,404,601	1,133,105,000	999,000	2,482,176
21	Oct 18, 2024 06:58	1,957,538	1,163,301,284	1,131,375,000	3,997,000	2,375,680
22	Oct 17, 2024 12:46	1,959,410	1,158,457,149	1,136,458,000	0	2,285,568
23	Oct 18, 2024 07:33	1,960,586	1,162,797,682	1,133,144,000	3,996,000	2,510,848
24	Oct 18, 2024 07:33	1,960,714	1,163,063,545	1,135,216,000	1,998,000	2,482,176
25	Oct 18, 2024 07:33	1,961,288	1,165,332,861	1,135,548,000	1,999,000	2,367,488
26	Oct 18, 2024 07:01	1,962,478	1,163,928,608	1,136,239,000	1,998,000	2,482,176
27	Oct 18, 2024 07:34	1,962,717	1,167,166,938	1,135,378,000	2,998,000	2,363,392
28	Oct 18, 2024 07:01	1,964,391	1,169,088,838	1,136,349,000	2,998,000	2,482,176
29	Oct 18, 2024 07:32	1,964,419	1,164,436,713	1,136,365,000	2,998,000	2,363,392
30	Oct 18, 2024 07:01	1,964,614	1,169,585,838	1,136,478,000	2,998,000	2,478,080
31	Oct 18, 2024 07:33	1,964,753	1,165,566,865	1,137,558,000	1,999,000	2,371,584
32	Oct 17, 2024 12:58	1,965,617	1,168,054,310	1,137,061,000	2,997,000	2,482,176
33	Oct 17, 2024 12:46	1,965,617	1,166,358,383	1,138,058,000	2,000,000	2,482,176
34	Oct 18, 2024 07:33	1,966,800	1,163,001,902	1,138,745,000	1,999,000	2,482,176
35	Oct 18, 2024 07:33	1,967,200	1,169,672,159	1,137,977,000	2,999,000	2,273,280
36	Oct 18, 2024 07:34	1,967,309	1,169,209,459	1,139,041,000	1,998,000	2,375,680
37	Oct 17, 2024 12:46	1,967,486	1,167,686,537	1,139,142,000	2,000,000	2,482,176
38	Oct 17, 2024 12:58	1,967,862	1,168,032,910	1,139,362,000	1,998,000	2,482,176
39	Oct 18, 2024 07:33	1,968,155	1,162,079,862	1,137,532,000	3,998,000	2,371,584
40	Oct 17, 2024 12:46	1,968,191	1,165,584,848	1,139,552,000	1,999,000	2,285,568
41	Oct 18, 2024 07:33	1,968,226	1,168,526,573	1,139,572,000	1,999,000	2,482,176
42	Oct 18, 2024 07:34	1,968,303	1,169,352,721	1,137,618,000	3,998,000	2,482,176
43	Oct 18, 2024 06:58	1,968,588	1,165,700,254	1,139,782,000	1,999,000	2,375,680
44	Oct 18, 2024 07:34	1,969,143	1,172,713,353	1,139,103,000	3,000,000	2,371,584
45	Oct 18, 2024 07:01	1,969,262	1,173,874,737	1,141,173,000	999,000	2,482,176
46	Oct 18, 2024 06:58	1,969,297	1,174,612,524	1,140,194,000	1,998,000	2,371,584
47	Oct 18, 2024 07:33	1,969,681	1,173,753,596	1,140,417,000	1,998,000	2,375,680
48	Oct 18, 2024 06:58	1,970,067	1,173,516,132	1,140,640,000	1,999,000	2,482,176
49	Oct 18, 2024 07:01	1,970,395	1,164,116,205	1,141,830,000	999,000	2,482,176
50	Oct 18, 2024 07:33	1,970,543	1,172,807,566	1,138,916,000	3,999,000	2,367,488
51	Oct 18, 2024 07:32	1,971,269	1,172,532,826	1,139,339,000	3,997,000	2,371,584
52	Oct 18, 2024 07:01	1,971,622	1,162,970,935	1,142,542,000	999,000	2,482,176
53	Oct 18, 2024 07:34	1,971,660	1,172,535,882	1,139,565,000	3,998,000	2,371,584
54	Oct 17, 2024 12:58	1,971,788	1,168,292,484	1,140,638,000	2,999,000	2,482,176
55	Oct 17, 2024 12:58	1,971,810	1,167,913,492	1,140,651,000	2,999,000	2,273,280
56	Oct 18, 2024 07:34	1,972,107	1,172,020,199	1,141,825,000	1,997,000	2,273,280
57	Oct 18, 2024 07:34	1,972,319	1,171,597,422	1,140,948,000	2,997,000	2,482,176
58	Oct 18, 2024 07:33	1,972,400	1,169,696,104	1,140,995,000	2,997,000	2,482,176
59	Oct 18, 2024 07:34	1,973,624	1,169,689,360	1,140,704,000	3,998,000	2,482,176
60	Oct 18, 2024 07:33	1,974,086	1,168,107,321	1,141,971,000	2,999,000	2,482,176
61	Oct 17, 2024 12:46	1,974,329	1,177,814,910	1,141,115,000	3,996,000	2,482,176
62	Oct 17, 2024 12:46	1,974,995	1,171,853,484	1,145,497,000	0	2,273,280
63	Oct 18, 2024 07:01	1,976,222	1,176,512,592	1,144,211,000	1,998,000	2,482,176
64	Oct 17, 2024 12:46	1,976,655	1,168,709,369	1,143,462,000	2,998,000	2,482,176
65	Oct 18, 2024 06:58	1,978,029	1,176,415,647	1,144,259,000	2,998,000	2,482,176
66	Oct 18, 2024 07:33	1,978,157	1,176,165,112	1,145,333,000	1,998,000	2,371,584

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