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 14:15	0	0	0	0	0	Error: expected "1350617 ", got "1346356 "
2	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "2517797 ", got "2676909 "
3	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "1685825 ", got "1972318 "
4	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "2146669 ", got "2146934 "
5	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "1113526 ", got "1143243 "
6	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "2902682 ", got "3154493 "
7	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "1469768 ", got "1470566 "
8	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "2075752 ", got "2075262 "
9	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "802840 ", got "819025 "
10	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "1683876 ", got "1682653 "
11	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "979665 ", got "980049 "
12	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "1167218 ", got "1168871 "
13	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "1468694 ", got "1468494 "
14	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "1892502 ", got "1915644 "
15	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "1494258 ", got "1932097 "
16	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "879741 ", got "883587 "
17	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "1610359 ", got "1614358 "
18	Oct 16, 2024 14:15	0	0	0	0	0	Error: expected "765762 ", got "764145 "
19	Oct 17, 2024 09:04	0	0	0	0	0	Error: expected "1394986 ", got "1396018 "
20	Oct 17, 2024 09:04	0	0	0	0	0	Error: expected "965259 ", got "1000357 "
21	Oct 17, 2024 09:04	0	0	0	0	0	Error: expected "2012834 ", got "2029232 "
22	Oct 17, 2024 09:04	0	0	0	0	0	Error: expected "1915872 ", got "2195991 "
23	Oct 17, 2024 09:04	0	0	0	0	0	Error: expected "994228 ", got "996762 "
24	Oct 16, 2024 14:15	46,586	52,190,552	25,019,000	2,001,000	2,469,888
25	Oct 16, 2024 14:15	46,650	50,395,364	23,049,000	4,008,000	2,494,464
26	Oct 16, 2024 14:15	46,724	51,337,451	25,093,000	2,007,000	2,465,792
27	Oct 16, 2024 14:15	46,769	49,444,371	23,108,000	4,018,000	2,469,888
28	Oct 16, 2024 14:15	46,812	55,677,587	23,129,000	4,022,000	2,469,888
29	Oct 16, 2024 14:15	46,881	54,358,650	24,170,000	3,021,000	2,453,504
30	Oct 16, 2024 14:15	46,888	58,224,593	24,174,000	3,021,000	2,453,504
31	Oct 16, 2024 14:15	46,905	53,262,363	23,175,000	4,030,000	2,416,640
32	Oct 16, 2024 14:15	46,933	49,479,892	26,213,000	1,008,000	2,473,984
33	Oct 16, 2024 14:15	46,938	48,457,443	23,191,000	4,033,000	2,465,792
34	Oct 16, 2024 14:15	46,943	50,320,646	23,194,000	4,033,000	2,498,560
35	Oct 16, 2024 14:15	46,995	54,739,335	24,229,000	3,028,000	2,363,392
36	Oct 16, 2024 14:15	47,010	50,990,867	24,237,000	3,029,000	2,473,984
37	Oct 16, 2024 14:15	47,031	54,848,747	25,258,000	2,020,000	2,289,664
38	Oct 16, 2024 14:15	47,079	57,032,357	25,284,000	2,022,000	2,473,984
39	Oct 16, 2024 14:15	47,150	48,461,415	26,335,000	1,012,000	2,314,240
40	Oct 16, 2024 14:15	47,240	55,654,026	24,355,000	3,044,000	2,461,696
41	Oct 16, 2024 14:15	47,328	50,393,759	26,434,000	1,016,000	2,445,312
42	Oct 16, 2024 14:15	47,345	53,423,476	22,375,000	5,085,000	2,289,664
43	Oct 16, 2024 14:15	47,724	53,725,611	24,605,000	3,075,000	2,334,720
44	Oct 17, 2024 09:04	48,672	57,534,621	26,214,000	2,016,000	2,289,664
45	Oct 17, 2024 09:04	48,717	54,800,668	26,238,000	2,018,000	2,265,088
46	Oct 17, 2024 09:04	48,753	55,464,640	25,248,000	3,029,000	2,297,856
47	Oct 17, 2024 09:05	48,893	53,203,119	26,333,000	2,025,000	2,465,792
48	Oct 17, 2024 09:05	48,922	52,890,569	23,308,000	5,067,000	2,289,664
49	Oct 17, 2024 09:05	49,019	52,207,248	23,354,000	5,077,000	2,461,696
50	Oct 16, 2024 14:15	50,171	51,339,765	26,089,000	3,010,000	2,461,696

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