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 listDec 21, 2025 04:06

Josu San MartinScore: 37,176Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 21, 2025 04:06	35,467	47,048,913	19,543,000	1,028,000	2,453,504
2	Dec 21, 2025 04:05	36,057	48,519,970	18,922,000	1,991,000	2,473,984
3	Dec 21, 2025 04:05	36,083	46,005,321	18,935,000	1,993,000	2,465,792
4	Dec 21, 2025 04:06	36,264	47,758,047	19,030,000	2,003,000	2,437,120
5	Dec 21, 2025 04:24	36,284	43,658,784	20,043,000	1,002,000	2,269,184
6	Dec 21, 2025 04:06	36,319	46,544,735	18,056,000	3,009,000	2,469,888
7	Dec 21, 2025 04:10	36,671	45,799,216	20,257,000	1,012,000	2,379,776
8	Dec 21, 2025 04:06	36,684	43,687,259	20,264,000	1,013,000	2,383,872
9	Dec 21, 2025 04:11	36,745	44,765,924	21,312,000	0	2,416,640
10	Dec 21, 2025 04:25	36,826	43,341,847	20,342,000	1,017,000	2,301,952
11	Dec 21, 2025 04:10	36,921	44,547,847	20,395,000	1,019,000	2,301,952
12	Dec 21, 2025 04:05	36,952	46,159,019	20,412,000	1,020,000	2,519,040
13	Dec 21, 2025 04:06	37,084	41,322,337	20,485,000	1,024,000	2,428,928
14	Dec 21, 2025 04:06	37,116	44,163,326	19,477,000	2,050,000	2,347,008
15	Dec 21, 2025 04:24	37,131	47,380,075	20,511,000	1,025,000	2,367,488
16	Dec 21, 2025 04:24	37,176	43,516,223	21,562,000	0	2,375,680
17	Dec 21, 2025 04:25	37,229	43,873,102	20,565,000	1,028,000	2,347,008
18	Dec 21, 2025 04:06	37,293	43,888,179	20,600,000	1,030,000	2,412,544
19	Dec 21, 2025 04:11	37,300	51,707,675	21,634,000	0	2,371,584
20	Dec 21, 2025 04:24	37,305	48,500,205	21,637,000	0	2,347,008
21	Dec 21, 2025 04:06	37,350	51,295,005	20,632,000	1,031,000	2,371,584
22	Dec 21, 2025 04:06	37,367	44,606,982	20,641,000	1,032,000	2,400,256
23	Dec 21, 2025 04:06	37,372	51,198,835	20,644,000	1,032,000	2,375,680
24	Dec 21, 2025 04:24	37,495	50,080,236	21,747,000	0	2,379,776
25	Dec 21, 2025 04:25	37,512	47,730,284	20,721,000	1,036,000	2,449,408
26	Dec 21, 2025 04:10	37,764	50,712,396	19,912,000	1,991,000	2,416,640
27	Dec 21, 2025 04:24	37,774	46,659,698	19,918,000	1,991,000	2,404,352
28	Dec 21, 2025 04:11	37,779	48,392,405	18,924,000	2,988,000	2,306,048
29	Dec 21, 2025 04:06	37,869	51,011,481	20,966,000	998,000	2,359,296
30	Dec 21, 2025 04:06	38,086	52,719,785	20,082,000	2,008,000	2,465,792

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