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 16, 2024 13:02	0	0	0	0	0	Error: expected "1541945 ", got "1540843 "
2	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1500823 ", got "1499249 "
3	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1342999 ", got "1347146 "
4	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "998101 ", got "996670 "
5	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1702534 ", got "1704744 "
6	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "822561 ", got "823756 "
7	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "2007614 ", got "2006781 "
8	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1142229 ", got "1147837 "
9	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1026597 ", got "1030662 "
10	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "2582643 ", got "2584761 "
11	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1956849 ", got "1977599 "
12	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1756074 ", got "1752816 "
13	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1599581 ", got "1605526 "
14	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1031174 ", got "1025416 "
15	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "695112 ", got "696344 "
16	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1002262 ", got "1030091 "
17	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1647483 ", got "1650037 "
18	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "995298 ", got "998378 "
19	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "1569133 ", got "1565843 "
20	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "1954131 ", got "1953586 "
21	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "2125354 ", got "2125315 "
22	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "789038 ", got "836404 "
23	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "2639697 ", got "2639689 "
24	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "2055128 ", got "2093146 "
25	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "1672215 ", got "1670695 "
26	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "1011251 ", got "1011256 "
27	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "3856525 ", got "3965347 "
28	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "2937962 ", got "2935690 "
29	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "2710726 ", got "2795313 "
30	Oct 16, 2024 13:03	0	0	0	0	0	Error: expected "806589 ", got "856420 "
31	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "1736956 ", got "1738038 "
32	Oct 16, 2024 13:02	0	0	0	0	0	Error: expected "2299218 ", got "2304826 "
33	Oct 16, 2024 13:03	52,759	58,019,236	29,580,000	1,020,000	2,265,088
34	Oct 16, 2024 13:03	52,760	52,556,139	27,541,000	3,060,000	2,469,888
35	Oct 16, 2024 13:02	52,824	52,514,822	29,617,000	1,021,000	2,461,696
36	Oct 16, 2024 13:03	52,843	57,208,516	29,628,000	1,021,000	2,465,792
37	Oct 16, 2024 13:02	52,921	59,190,880	30,694,000	0	2,445,312
38	Oct 16, 2024 13:03	52,962	65,803,244	28,671,000	2,047,000	2,465,792
39	Oct 16, 2024 13:03	53,112	56,244,451	27,824,000	2,981,000	2,441,216
40	Oct 16, 2024 13:02	53,264	57,537,751	29,897,000	996,000	2,461,696
41	Oct 16, 2024 13:02	53,264	61,376,085	29,897,000	996,000	2,461,696
42	Oct 16, 2024 13:02	53,271	57,235,399	26,911,000	3,986,000	2,465,792
43	Oct 16, 2024 13:03	53,279	53,576,801	28,909,000	1,993,000	2,465,792
44	Oct 16, 2024 13:03	53,367	54,278,588	29,955,000	998,000	2,469,888
45	Oct 16, 2024 13:02	53,472	51,896,607	27,013,000	4,001,000	2,469,888
46	Oct 16, 2024 13:02	53,690	55,109,126	29,131,000	2,009,000	2,461,696
47	Oct 16, 2024 13:02	53,700	56,367,118	27,128,000	4,018,000	2,461,696
48	Oct 16, 2024 13:02	53,802	55,817,427	26,172,000	5,033,000	2,506,752
49	Oct 16, 2024 13:02	53,814	53,554,650	27,185,000	4,027,000	2,424,832
50	Oct 16, 2024 13:02	53,838	57,255,502	29,212,000	2,014,000	2,502,656
51	Oct 16, 2024 13:02	53,879	57,731,009	28,226,000	3,024,000	2,465,792
52	Oct 16, 2024 13:02	54,009	52,343,860	27,283,000	4,042,000	2,465,792
53	Oct 16, 2024 13:03	54,028	52,924,813	28,304,000	3,032,000	2,277,376
54	Oct 16, 2024 13:02	54,100	59,576,064	29,354,000	2,024,000	2,453,504
55	Oct 16, 2024 13:02	54,109	55,457,816	28,346,000	3,037,000	2,494,464
56	Oct 16, 2024 13:03	54,112	61,712,358	27,336,000	4,049,000	2,465,792
57	Oct 16, 2024 13:02	54,160	62,393,040	28,373,000	3,040,000	2,465,792
58	Oct 16, 2024 13:02	54,391	60,873,517	29,512,000	2,035,000	2,441,216
59	Oct 16, 2024 13:02	54,491	60,188,682	28,547,000	3,058,000	2,310,144

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