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 listMar 27, 2024 13:09

E Sequeira

Score: 76,598

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 27, 2024 13:09	75,667	74,571,804	41,893,000	1,994,000	2,506,752
2	Mar 27, 2024 13:09	75,688	74,340,998	41,904,000	1,995,000	2,519,040
3	Mar 27, 2024 13:09	75,726	77,599,326	42,923,000	998,000	2,285,568
4	Mar 27, 2024 13:09	75,762	67,345,204	41,945,000	1,997,000	2,510,848
5	Mar 27, 2024 13:10	75,767	69,552,877	41,948,000	1,997,000	2,510,848
6	Mar 27, 2024 13:10	75,798	66,482,051	41,965,000	1,998,000	2,285,568
7	Mar 27, 2024 13:10	75,840	66,714,787	42,988,000	999,000	2,273,280
8	Mar 27, 2024 13:09	75,886	69,194,868	42,014,000	2,000,000	2,285,568
9	Mar 27, 2024 13:10	76,038	76,540,764	42,098,000	2,004,000	2,285,568
10	Mar 27, 2024 13:09	76,064	68,011,189	42,112,000	2,005,000	2,260,992
11	Mar 27, 2024 13:10	76,093	72,117,877	42,128,000	2,006,000	2,285,568
12	Mar 27, 2024 13:09	76,124	66,488,951	42,146,000	2,006,000	2,510,848
13	Mar 27, 2024 13:10	76,214	71,175,770	42,195,000	2,009,000	2,510,848
14	Mar 27, 2024 13:09	76,334	66,827,614	42,262,000	2,012,000	2,285,568
15	Mar 27, 2024 13:09	76,497	68,017,954	44,368,000	0	2,285,568
16	Mar 27, 2024 13:09	76,507	68,401,222	43,366,000	1,008,000	2,519,040
17	Mar 27, 2024 13:09	76,509	65,719,148	44,375,000	0	2,260,992
18	Mar 27, 2024 13:09	76,576	73,998,332	43,405,000	1,009,000	2,519,040
19	Mar 27, 2024 13:09	76,598	66,503,953	43,418,000	1,009,000	2,510,848
20	Mar 27, 2024 13:10	76,621	67,315,260	43,430,000	1,010,000	2,273,280
21	Mar 27, 2024 13:10	76,907	72,607,617	43,593,000	1,013,000	2,285,568
22	Mar 27, 2024 13:09	77,081	70,690,498	44,707,000	0	2,510,848
23	Mar 27, 2024 13:09	77,098	76,157,260	43,701,000	1,016,000	2,269,184
24	Mar 27, 2024 13:10	77,174	71,949,158	43,744,000	1,017,000	2,285,568
25	Mar 27, 2024 13:09	77,317	71,178,880	43,848,000	996,000	2,285,568
26	Mar 27, 2024 13:09	77,434	72,775,425	42,916,000	1,996,000	2,285,568
27	Mar 27, 2024 13:09	77,681	70,724,627	43,053,000	2,002,000	2,285,568
28	Mar 27, 2024 13:09	80,203	114,380,887	46,517,756	0	2,232,320
29	Mar 27, 2024 13:09	80,446	110,389,828	46,658,534	0	2,232,320
30	Mar 27, 2024 13:09	80,475	115,619,678	46,675,481	0	2,232,320
31	Mar 27, 2024 13:10	80,861	108,986,991	46,899,594	0	2,224,128
32	Mar 27, 2024 13:09	80,871	105,497,977	46,904,944	0	2,232,320
33	Mar 27, 2024 13:10	80,927	100,481,976	46,937,410	0	2,232,320
34	Mar 27, 2024 13:09	80,999	103,170,536	46,979,665	0	2,236,416
35	Mar 27, 2024 13:09	81,008	112,933,123	46,984,728	0	2,224,128
36	Mar 27, 2024 13:10	81,688	107,099,250	47,379,109	0	2,228,224

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