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 listDec 5, 2023 09:28

matsuoka-601

Score: 49,967

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 5, 2023 09:30	48,690	95,519,714	28,240,315	0	2,306,048
2	Dec 5, 2023 09:30	48,789	89,417,954	28,297,761	0	2,174,976
3	Dec 5, 2023 09:28	48,856	105,208,796	28,336,417	0	2,183,168
4	Dec 5, 2023 09:30	49,041	117,721,328	28,444,038	0	2,306,048
5	Dec 5, 2023 09:28	49,074	94,653,071	28,462,725	0	2,256,896
6	Dec 5, 2023 09:30	49,318	104,819,902	28,604,261	0	2,179,072
7	Dec 5, 2023 09:28	49,463	109,220,935	28,688,533	0	2,252,800
8	Dec 5, 2023 09:28	49,562	58,700,261	28,746,000	0	2,285,568
9	Dec 5, 2023 09:30	49,784	92,159,307	28,874,866	0	2,183,168
10	Dec 5, 2023 09:30	49,802	56,715,682	26,893,000	1,992,000	2,277,376
11	Dec 5, 2023 09:30	49,807	53,298,948	28,888,000	0	2,473,984
12	Dec 5, 2023 09:28	49,809	57,441,464	26,897,000	1,992,000	2,277,376
13	Dec 5, 2023 09:30	49,819	53,521,001	26,903,000	1,992,000	2,478,080
14	Dec 5, 2023 09:30	49,822	56,596,827	27,901,000	996,000	2,285,568
15	Dec 5, 2023 09:30	49,824	57,077,391	27,902,000	996,000	2,277,376
16	Dec 5, 2023 09:30	49,836	59,906,083	26,912,000	1,993,000	2,277,376
17	Dec 5, 2023 09:30	49,912	53,415,632	26,953,000	1,996,000	2,473,984
18	Dec 5, 2023 09:30	49,919	55,732,528	27,955,000	998,000	2,285,568
19	Dec 5, 2023 09:28	49,967	51,036,926	26,983,000	1,998,000	2,478,080
20	Dec 5, 2023 09:30	49,969	50,651,446	26,984,000	1,998,000	2,482,176
21	Dec 5, 2023 09:30	50,053	52,168,700	27,029,000	2,002,000	2,285,568
22	Dec 5, 2023 09:30	50,140	51,812,032	27,076,000	2,005,000	2,473,984
23	Dec 5, 2023 09:30	50,141	56,056,838	27,077,000	2,005,000	2,473,984
24	Dec 5, 2023 09:30	50,143	93,015,073	29,082,899	0	2,179,072
25	Dec 5, 2023 09:30	50,188	52,192,340	28,106,000	1,003,000	2,306,048
26	Dec 5, 2023 09:28	50,191	54,152,935	27,104,000	2,007,000	2,490,368
27	Dec 5, 2023 09:30	50,245	54,918,647	27,133,000	2,009,000	2,486,272
28	Dec 5, 2023 09:30	50,257	52,545,351	28,144,000	1,005,000	2,482,176
29	Dec 5, 2023 09:28	50,293	55,379,265	28,165,000	1,005,000	2,285,568
30	Dec 5, 2023 09:28	50,303	52,995,168	27,164,000	2,012,000	2,277,376
31	Dec 5, 2023 09:28	50,360	52,186,817	27,195,000	2,014,000	2,478,080
32	Dec 5, 2023 09:28	50,388	51,391,012	27,210,000	2,015,000	2,482,176
33	Dec 5, 2023 09:30	50,410	51,895,510	28,230,000	1,008,000	2,285,568
34	Dec 5, 2023 09:28	50,500	56,868,499	27,270,000	2,020,000	2,277,376
35	Dec 5, 2023 09:30	50,721	52,483,594	28,404,000	1,014,000	2,473,984
36	Dec 5, 2023 09:30	51,816	58,714,226	28,050,000	2,003,000	2,469,888

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