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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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Oct 15, 2024 20:08	0	0	0	0	0	Error: expected "693937 ", got "694203 "
2	Oct 15, 2024 19:57	0	0	0	0	0	Error: expected "1169096 ", got "1172302 "
3	Oct 15, 2024 19:52	0	0	0	0	0	Error: expected "1968840 ", got "1971567 "
4	Oct 15, 2024 19:52	0	0	0	0	0	Error: No answer to stdout. Died or killed?
5	Oct 15, 2024 19:52	0	0	0	0	0	Error: No answer to stdout. Died or killed?
6	Oct 15, 2024 19:52	64,071	62,405,375	33,144,000	4,017,000	2,301,952
7	Oct 15, 2024 19:52	64,347	59,710,317	34,295,000	3,026,000	2,469,888
8	Oct 15, 2024 19:52	65,740	61,570,042	36,123,000	2,006,000	2,469,888
9	Oct 15, 2024 20:08	66,590	63,075,902	37,606,000	1,016,000	2,461,696
10	Oct 15, 2024 20:08	67,057	63,778,859	34,904,000	3,989,000	2,301,952
11	Oct 15, 2024 20:08	67,072	67,077,750	34,912,000	3,990,000	2,363,392
12	Oct 15, 2024 20:08	67,116	70,744,995	34,935,000	3,992,000	2,453,504
13	Oct 15, 2024 20:08	67,200	63,821,188	34,979,000	3,997,000	2,469,888
14	Oct 15, 2024 20:08	67,253	61,534,437	37,007,000	2,000,000	2,473,984
15	Oct 15, 2024 20:08	67,298	62,825,870	36,031,000	3,002,000	2,322,432
16	Oct 15, 2024 20:08	67,305	65,322,522	36,035,000	3,002,000	2,469,888
17	Oct 15, 2024 20:08	67,505	63,067,196	36,142,000	3,011,000	2,281,472
18	Oct 15, 2024 20:08	67,566	61,546,363	36,174,000	3,014,000	2,404,352
19	Oct 15, 2024 20:08	67,828	72,671,188	34,297,000	5,043,000	2,465,792
20	Oct 15, 2024 20:08	68,000	68,516,799	35,395,000	4,045,000	2,465,792
21	Oct 15, 2024 19:57	69,772	61,754,424	38,445,000	2,023,000	2,469,888
22	Oct 15, 2024 19:57	69,959	64,488,861	40,576,000	0	2,473,984
23	Oct 15, 2024 19:57	70,029	69,227,521	38,587,000	2,030,000	2,510,848
24	Oct 15, 2024 19:42	70,214	72,916,903	37,670,000	3,054,000	2,355,200
25	Oct 15, 2024 19:42	70,253	74,000,556	39,729,000	1,018,000	2,465,792
26	Oct 15, 2024 19:57	70,507	67,310,984	38,900,000	1,994,000	2,269,184
27	Oct 15, 2024 19:42	70,509	70,267,349	38,901,000	1,994,000	2,351,104
28	Oct 15, 2024 19:42	70,524	70,622,583	38,909,000	1,995,000	2,514,944
29	Oct 15, 2024 19:42	70,579	71,424,727	38,940,000	1,996,000	2,523,136
30	Oct 15, 2024 19:42	70,828	72,767,111	37,073,000	4,007,000	2,375,680
31	Oct 15, 2024 19:57	70,914	70,170,042	39,124,000	2,006,000	2,306,048
32	Oct 15, 2024 19:42	71,009	68,978,907	36,163,000	5,022,000	2,478,080
33	Oct 15, 2024 19:42	71,195	63,718,432	38,272,000	3,021,000	2,510,848
34	Oct 15, 2024 19:57	71,309	66,921,969	37,324,000	4,035,000	2,428,928
35	Oct 15, 2024 19:42	71,379	66,247,087	37,361,000	4,039,000	2,289,664

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