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.

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CadovvlScore: 70,236Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Aug 13, 2025 13:21	69,590	67,232,863	39,353,000	1,009,000	2,392,064
2	Aug 18, 2025 20:42	69,603	66,750,796	40,370,000	0	2,379,776
3	Aug 11, 2025 20:49	69,616	66,138,468	40,377,000	0	2,379,776
4	Aug 11, 2025 20:49	69,779	61,783,912	39,461,000	1,011,000	2,519,040
5	Aug 18, 2025 20:46	69,859	65,551,183	40,518,000	0	2,519,040
6	Aug 11, 2025 20:47	69,902	66,487,056	40,543,000	0	2,519,040
7	Aug 13, 2025 13:21	69,907	66,306,285	39,533,000	1,013,000	2,519,040
8	Aug 18, 2025 20:42	69,928	64,675,579	39,545,000	1,013,000	2,260,992
9	Aug 11, 2025 20:47	69,986	65,597,492	39,578,000	1,014,000	2,506,752
10	Aug 13, 2025 13:21	70,000	65,830,007	39,585,000	1,015,000	2,383,872
11	Aug 11, 2025 20:49	70,016	64,255,574	39,594,000	1,015,000	2,387,968
12	Aug 18, 2025 20:42	70,017	63,367,139	39,595,000	1,015,000	2,519,040
13	Aug 13, 2025 13:21	70,028	65,205,744	39,601,000	1,015,000	2,392,064
14	Aug 18, 2025 20:42	70,029	66,821,462	39,602,000	1,015,000	2,519,040
15	Aug 13, 2025 13:21	70,047	63,022,456	40,627,000	0	2,387,968
16	Aug 11, 2025 20:49	70,048	60,897,001	40,628,000	0	2,260,992
17	Aug 11, 2025 20:48	70,062	68,015,424	40,636,000	0	2,392,064
18	Aug 13, 2025 13:21	70,062	61,489,133	40,636,000	0	2,383,872
19	Aug 18, 2025 20:42	70,072	71,711,699	39,626,000	1,016,000	2,506,752
20	Aug 11, 2025 20:47	70,086	70,899,536	40,650,000	0	2,519,040
21	Aug 11, 2025 20:49	70,217	66,345,577	38,740,000	1,986,000	2,519,040
22	Aug 13, 2025 13:21	70,236	66,743,296	39,719,000	1,018,000	2,506,752
23	Aug 11, 2025 20:47	70,259	65,856,399	39,732,000	1,018,000	2,260,992
24	Aug 11, 2025 20:47	70,271	65,791,912	39,739,000	1,018,000	2,260,992
25	Aug 18, 2025 20:42	70,276	65,720,945	39,741,000	1,019,000	2,260,992
26	Aug 11, 2025 20:49	70,281	64,169,511	39,744,000	1,019,000	2,260,992
27	Aug 18, 2025 20:42	70,283	66,948,580	39,745,000	1,019,000	2,519,040
28	Aug 11, 2025 20:48	70,483	65,414,134	38,886,000	1,994,000	2,519,040
29	Aug 11, 2025 20:48	70,483	66,970,831	38,886,000	1,994,000	2,260,992
30	Aug 18, 2025 20:42	70,486	69,713,853	40,882,000	0	2,383,872
31	Aug 13, 2025 13:21	70,497	67,614,550	39,891,000	997,000	2,379,776
32	Aug 11, 2025 20:47	70,500	64,766,635	39,868,000	1,022,000	2,260,992
33	Aug 18, 2025 20:42	70,502	67,192,149	39,894,000	997,000	2,506,752
34	Aug 11, 2025 20:49	70,522	69,086,400	38,908,000	1,995,000	2,392,064
35	Aug 13, 2025 13:21	70,524	69,606,518	39,907,000	997,000	2,260,992
36	Aug 18, 2025 20:46	70,529	66,326,042	38,912,000	1,995,000	2,519,040
37	Aug 18, 2025 20:46	70,576	66,458,370	38,938,000	1,996,000	2,260,992
38	Aug 11, 2025 20:47	70,583	67,944,296	39,940,000	998,000	2,260,992
39	Aug 11, 2025 20:49	70,703	65,029,200	39,008,000	2,000,000	2,256,896
40	Aug 11, 2025 20:47	70,712	71,987,161	39,013,000	2,000,000	2,519,040
41	Aug 11, 2025 20:47	70,990	70,029,458	39,166,000	2,008,000	2,506,752
42	Aug 11, 2025 20:49	71,064	70,021,320	40,212,000	1,005,000	2,260,992

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