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 listApr 19, 2024 08:36

E Sequeira

Score: 76,553

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Apr 20, 2024 13:50	75,147	70,442,690	43,585,000	0	2,519,040
2	Apr 20, 2024 14:16	75,198	65,179,752	42,601,000	1,014,000	2,285,568
3	Apr 20, 2024 14:16	75,336	72,925,131	43,695,000	0	2,285,568
4	Apr 19, 2024 08:36	75,352	74,555,422	42,688,000	1,016,000	2,510,848
5	Apr 20, 2024 14:16	75,421	70,906,248	42,727,000	1,017,000	2,510,848
6	Apr 20, 2024 14:16	75,612	70,850,199	42,859,000	996,000	2,260,992
7	Apr 19, 2024 08:36	75,659	68,439,677	41,888,000	1,994,000	2,342,912
8	Apr 19, 2024 08:36	75,772	73,695,258	41,951,000	1,997,000	2,285,568
9	Apr 20, 2024 13:50	75,778	68,204,786	42,953,000	998,000	2,510,848
10	Apr 19, 2024 08:36	75,955	80,431,634	42,052,000	2,002,000	2,285,568
11	Apr 19, 2024 08:36	76,055	69,185,488	42,107,000	2,005,000	2,510,848
12	Apr 19, 2024 08:36	76,078	63,215,094	42,120,000	2,005,000	2,285,568
13	Apr 20, 2024 14:16	76,250	66,786,253	42,215,000	2,010,000	2,510,848
14	Apr 20, 2024 14:16	76,291	70,470,890	42,238,000	2,011,000	2,379,776
15	Apr 20, 2024 14:16	76,305	71,596,264	42,246,000	2,011,000	2,285,568
16	Apr 19, 2024 08:36	76,312	76,583,371	42,250,000	2,011,000	2,510,848
17	Apr 20, 2024 14:16	76,321	66,324,676	42,254,000	2,012,000	2,285,568
18	Apr 19, 2024 08:36	76,453	67,660,196	43,336,000	1,007,000	2,285,568
19	Apr 20, 2024 13:50	76,553	65,554,370	43,392,000	1,009,000	2,510,848
20	Apr 20, 2024 13:50	76,610	64,941,471	43,425,000	1,009,000	2,510,848
21	Apr 20, 2024 13:50	76,686	67,992,797	44,478,000	0	2,285,568
22	Apr 20, 2024 13:50	76,690	74,871,667	43,470,000	1,010,000	2,260,992
23	Apr 20, 2024 14:16	76,697	67,643,679	43,473,000	1,011,000	2,510,848
24	Apr 20, 2024 13:50	76,698	66,096,304	43,474,000	1,011,000	2,285,568
25	Apr 20, 2024 13:50	76,822	69,840,388	43,545,000	1,012,000	2,285,568
26	Apr 19, 2024 08:36	77,367	71,230,967	42,879,000	1,994,000	2,506,752
27	Apr 20, 2024 13:50	77,397	73,211,746	42,895,000	1,995,000	2,519,040
28	Apr 20, 2024 13:50	78,593	107,594,036	45,584,028	0	2,248,704
29	Apr 20, 2024 14:16	78,597	121,021,557	45,586,133	0	2,228,224
30	Apr 20, 2024 13:50	78,611	101,536,733	45,594,319	0	2,232,320
31	Apr 19, 2024 08:36	78,687	113,521,008	45,638,621	0	2,228,224
32	Apr 20, 2024 14:16	78,758	104,514,791	45,679,828	0	2,220,032
33	Apr 19, 2024 08:36	78,969	116,483,494	45,801,857	0	2,236,416
34	Apr 20, 2024 14:16	79,197	115,224,565	45,934,080	0	2,232,320
35	Apr 20, 2024 13:50	79,361	119,336,820	46,029,285	0	2,232,320
36	Apr 19, 2024 08:36	79,812	110,210,376	46,291,182	0	2,232,320

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