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 14, 2023 06:46

Sergey Stremin

Score: 76,096

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 14, 2023 06:46	74,902	71,003,785	43,443,000	0	2,281,472
2	Dec 14, 2023 06:49	74,947	65,711,615	42,459,000	1,010,000	2,351,104
3	Dec 14, 2023 06:46	74,981	64,673,950	43,489,000	0	2,482,176
4	Dec 14, 2023 06:47	74,991	63,304,299	42,484,000	1,011,000	2,453,504
5	Dec 14, 2023 06:47	75,194	113,807,860	43,612,694	0	2,297,856
6	Dec 14, 2023 06:46	75,224	68,320,743	42,616,000	1,014,000	2,473,984
7	Dec 14, 2023 06:49	75,602	124,199,324	43,849,303	0	2,297,856
8	Dec 14, 2023 06:46	75,710	69,653,413	43,912,000	0	2,355,200
9	Dec 14, 2023 06:47	75,728	115,200,296	43,922,114	0	2,297,856
10	Dec 14, 2023 06:46	75,852	71,548,421	41,995,000	1,999,000	2,281,472
11	Dec 14, 2023 06:47	75,855	74,509,313	41,997,000	1,999,000	2,355,200
12	Dec 14, 2023 06:46	75,883	107,735,310	44,012,397	0	2,293,760
13	Dec 14, 2023 06:49	75,897	73,311,157	43,020,000	1,000,000	2,355,200
14	Dec 14, 2023 06:47	75,940	70,032,942	43,044,000	1,001,000	2,281,472
15	Dec 14, 2023 06:47	75,952	70,631,099	42,050,000	2,002,000	2,355,200
16	Dec 14, 2023 06:46	75,986	103,043,876	44,072,163	0	2,293,760
17	Dec 14, 2023 06:46	76,019	117,665,884	44,090,970	0	2,297,856
18	Dec 14, 2023 06:46	76,022	66,998,451	43,091,000	1,002,000	2,347,008
19	Dec 14, 2023 06:49	76,096	113,888,069	44,135,961	0	2,256,896
20	Dec 14, 2023 06:49	76,119	110,901,485	44,149,007	0	2,289,664
21	Dec 14, 2023 06:46	76,228	69,024,914	42,203,000	2,009,000	2,355,200
22	Dec 14, 2023 06:47	76,317	64,996,645	43,258,000	1,006,000	2,281,472
23	Dec 14, 2023 06:47	76,586	68,013,935	44,420,000	0	2,281,472
24	Dec 14, 2023 06:47	76,710	71,365,808	43,481,000	1,011,000	2,445,312
25	Dec 14, 2023 06:49	76,788	67,580,035	43,525,000	1,012,000	2,281,472
26	Dec 14, 2023 06:46	76,816	66,792,013	44,553,000	0	2,281,472
27	Dec 14, 2023 06:49	76,821	71,044,548	43,544,000	1,012,000	2,355,200
28	Dec 14, 2023 06:49	77,072	69,130,398	44,702,000	0	2,281,472
29	Dec 14, 2023 06:47	77,655	72,905,492	43,039,000	2,001,000	2,281,472
30	Dec 14, 2023 06:47	78,155	111,469,305	45,329,669	0	2,256,896
31	Dec 14, 2023 06:49	78,174	66,211,903	45,341,000	0	2,347,008
32	Dec 14, 2023 06:46	78,321	70,451,075	44,417,000	1,009,000	2,281,472
33	Dec 14, 2023 06:49	79,902	71,641,675	46,343,000	0	2,281,472
34	Dec 14, 2023 06:49	79,971	67,775,401	45,375,000	1,008,000	2,338,816
35	Dec 14, 2023 06:49	82,617	74,290,146	46,920,000	998,000	2,281,472
36	Dec 14, 2023 06:47	83,514	74,580,569	48,438,000	0	2,281,472

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