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 14:17	0	0	0	0	0	Error: expected "976330 ", got "991922 "
2	Oct 16, 2024 14:35	0	0	0	0	0	Error: expected "2003116 ", got "2006401 "
3	Oct 16, 2024 14:35	0	0	0	0	0	Error: expected "1213522 ", got "1223122 "
4	Oct 16, 2024 14:35	0	0	0	0	0	Error: No answer to stdout. Died or killed?
5	Oct 16, 2024 14:35	0	0	0	0	0	Error: expected "1716394 ", got "1739426 "
6	Oct 16, 2024 14:17	0	0	0	0	0	Error: expected "714122 ", got "728049 "
7	Oct 16, 2024 14:17	0	0	0	0	0	Error: expected "2085620 ", got "2105857 "
8	Oct 16, 2024 14:17	0	0	0	0	0	Error: expected "1856210 ", got "1982057 "
9	Oct 16, 2024 14:17	0	0	0	0	0	Error: expected "684530 ", got "716428 "
10	Oct 16, 2024 14:35	0	0	0	0	0	Error: expected "1099871 ", got "1100066 "
11	Oct 16, 2024 14:17	0	0	0	0	0	Error: expected "793040 ", got "795321 "
12	Oct 16, 2024 14:17	0	0	0	0	0	Error: expected "1577778 ", got "1606820 "
13	Oct 16, 2024 14:17	0	0	0	0	0	Error: No answer to stdout. Died or killed?
14	Oct 16, 2024 14:17	0	0	0	0	0	Error: expected "2078268 ", got "2135867 "
15	Oct 16, 2024 14:17	0	0	0	0	0	Error: expected "1712648 ", got "1733735 "
16	Oct 16, 2024 14:16	0	0	0	0	0	Error: expected "1367139 ", got "1368478 "
17	Oct 16, 2024 14:16	0	0	0	0	0	Error: expected "1425373 ", got "1426725 "
18	Oct 16, 2024 14:16	0	0	0	0	0	Error: expected "1318637 ", got "2259324 "
19	Oct 16, 2024 14:35	0	0	0	0	0	Error: expected "1497090 ", got "1537619 "
20	Oct 16, 2024 14:36	0	0	0	0	0	Error: expected "2701153 ", got "2771711 "
21	Oct 16, 2024 14:37	0	0	0	0	0	Error: expected "1028287 ", got "1031896 "
22	Oct 16, 2024 14:38	0	0	0	0	0	Error: expected "849152 ", got "848862 "
23	Oct 16, 2024 14:38	0	0	0	0	0	Error: expected "719144 ", got "720760 "
24	Oct 16, 2024 14:38	0	0	0	0	0	Error: expected "1755124 ", got "1762213 "
25	Oct 16, 2024 14:38	0	0	0	0	0	Error: expected "2996077 ", got "2998463 "
26	Oct 16, 2024 14:38	0	0	0	0	0	Error: expected "1001211 ", got "1015958 "
27	Oct 16, 2024 14:38	0	0	0	0	0	Error: expected "1806634 ", got "1821140 "
28	Oct 16, 2024 14:38	0	0	0	0	0	Error: expected "572568 ", got "575268 "
29	Oct 17, 2024 08:59	0	0	0	0	0	Error: expected "1512992 ", got "1548382 "
30	Oct 17, 2024 08:59	0	0	0	0	0	Error: expected "1949000 ", got "1952777 "
31	Oct 17, 2024 08:59	0	0	0	0	0	Error: expected "1544488 ", got "1574560 "
32	Oct 17, 2024 08:59	0	0	0	0	0	Error: expected "2002321 ", got "2003502 "
33	Oct 17, 2024 08:59	0	0	0	0	0	Error: expected "746168 ", got "756483 "
34	Oct 16, 2024 14:16	0	0	0	0	0	Error: expected "798425 ", got "798817 "
35	Oct 16, 2024 14:16	0	0	0	0	0	Error: expected "1819153 ", got "1819762 "
36	Oct 16, 2024 14:16	0	0	0	0	0	Error: expected "2195249 ", got "2292554 "
37	Oct 16, 2024 14:16	0	0	0	0	0	Error: expected "2894219 ", got "2914241 "
38	Oct 16, 2024 14:16	0	0	0	0	0	Error: expected "1610212 ", got "1714147 "
39	Oct 16, 2024 14:16	45,231	48,448,437	22,198,000	4,036,000	2,359,296
40	Oct 16, 2024 14:37	45,407	47,321,502	23,298,000	3,038,000	2,322,432
41	Oct 16, 2024 14:35	45,505	48,587,676	25,378,000	1,015,000	2,330,624
42	Oct 16, 2024 14:35	45,510	51,597,876	23,351,000	3,045,000	2,281,472
43	Oct 17, 2024 08:59	45,533	54,178,437	23,362,000	3,047,000	2,465,792
44	Oct 16, 2024 14:38	45,550	48,247,697	24,387,000	2,032,000	2,465,792
45	Oct 16, 2024 14:16	45,641	47,626,347	24,436,000	2,036,000	2,469,888
46	Oct 16, 2024 14:16	45,667	50,240,891	24,450,000	2,037,000	2,289,664
47	Oct 16, 2024 14:16	45,683	47,746,367	23,439,000	3,057,000	2,465,792
48	Oct 16, 2024 14:16	45,734	53,853,668	24,486,000	2,040,000	2,449,408
49	Oct 16, 2024 14:16	45,747	56,473,310	21,431,000	5,102,000	2,289,664
50	Oct 16, 2024 14:17	45,766	51,527,338	24,503,000	2,041,000	2,449,408
51	Oct 16, 2024 14:17	45,912	53,295,151	25,605,000	1,024,000	2,514,944
52	Oct 17, 2024 08:59	45,945	55,079,615	23,574,000	3,074,000	2,469,888
53	Oct 17, 2024 08:59	45,964	56,131,586	25,634,000	1,025,000	2,400,256
54	Oct 16, 2024 14:38	45,983	56,088,013	25,645,000	1,025,000	2,293,760
55	Oct 16, 2024 14:17	45,986	53,598,773	24,621,000	2,051,000	2,461,696
56	Oct 16, 2024 14:16	46,238	53,882,011	22,845,000	3,973,000	2,273,280
57	Oct 16, 2024 14:16	46,281	53,709,360	23,861,000	2,982,000	2,338,816
58	Oct 16, 2024 14:37	46,353	58,171,311	23,898,000	2,987,000	2,473,984
59	Oct 16, 2024 14:16	46,359	53,242,825	26,888,000	0	2,281,472
60	Oct 16, 2024 14:16	46,366	54,072,733	22,908,000	3,984,000	2,478,080
61	Oct 16, 2024 14:38	46,367	53,566,019	24,901,000	1,992,000	2,478,080
62	Oct 16, 2024 14:37	46,388	52,463,822	25,909,000	996,000	2,383,872
63	Oct 16, 2024 14:16	46,407	49,608,510	23,926,000	2,990,000	2,453,504
64	Oct 16, 2024 14:35	46,493	48,892,098	24,969,000	1,997,000	2,371,584
65	Oct 16, 2024 14:16	47,133	50,417,674	24,300,000	3,037,000	2,330,624

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