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 17, 2024 19:15

E Sequeira

Score: 77,390

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Apr 17, 2024 19:15	75,693	69,548,181	41,907,000	1,995,000	2,285,568
2	Apr 17, 2024 19:20	75,705	69,428,121	43,909,000	0	2,260,992
3	Apr 17, 2024 19:20	75,726	70,753,901	42,923,000	998,000	2,519,040
4	Apr 17, 2024 19:20	75,907	69,088,389	42,025,000	2,001,000	2,285,568
5	Apr 17, 2024 19:15	75,938	66,259,450	42,042,000	2,002,000	2,510,848
6	Apr 17, 2024 19:15	76,038	79,603,427	43,100,000	1,002,000	2,285,568
7	Apr 17, 2024 19:15	76,064	69,929,070	42,112,000	2,005,000	2,510,848
8	Apr 17, 2024 19:15	76,167	71,184,593	42,169,000	2,008,000	2,510,848
9	Apr 17, 2024 19:17	76,226	64,274,957	42,202,000	2,009,000	2,285,568
10	Apr 17, 2024 19:17	76,234	72,007,096	42,207,000	2,009,000	2,506,752
11	Apr 17, 2024 19:15	76,452	66,180,293	43,335,000	1,007,000	2,510,848
12	Apr 17, 2024 19:20	76,562	65,569,207	43,397,000	1,009,000	2,519,040
13	Apr 17, 2024 19:17	76,569	67,655,486	43,401,000	1,009,000	2,285,568
14	Apr 17, 2024 19:17	76,776	67,437,342	43,518,000	1,012,000	2,285,568
15	Apr 17, 2024 19:20	76,931	76,160,603	43,606,000	1,014,000	2,285,568
16	Apr 17, 2024 19:15	77,009	73,218,916	43,650,000	1,015,000	2,510,848
17	Apr 17, 2024 19:17	77,148	69,671,639	43,730,000	1,016,000	2,285,568
18	Apr 17, 2024 19:17	77,386	72,594,022	43,887,000	997,000	2,285,568
19	Apr 17, 2024 19:15	77,390	73,460,403	43,889,000	997,000	2,285,568
20	Apr 17, 2024 19:20	77,395	68,201,348	42,894,000	1,995,000	2,510,848
21	Apr 17, 2024 19:20	77,417	71,251,868	43,905,000	997,000	2,285,568
22	Apr 17, 2024 19:20	77,481	68,164,522	42,942,000	1,997,000	2,273,280
23	Apr 17, 2024 19:17	77,540	73,313,669	42,975,000	1,998,000	2,285,568
24	Apr 17, 2024 19:17	77,547	67,956,660	42,978,000	1,999,000	2,285,568
25	Apr 17, 2024 19:15	77,581	66,302,385	42,998,000	1,999,000	2,285,568
26	Apr 17, 2024 19:17	77,722	72,134,672	43,076,000	2,003,000	2,260,992
27	Apr 17, 2024 19:20	77,978	63,388,484	44,222,000	1,005,000	2,519,040
28	Apr 17, 2024 19:15	79,589	122,847,811	46,161,805	0	2,220,032
29	Apr 17, 2024 19:15	79,737	103,213,992	46,247,653	0	2,224,128
30	Apr 17, 2024 19:20	80,240	111,473,017	46,539,316	0	2,236,416
31	Apr 17, 2024 19:15	80,302	111,344,621	46,575,304	0	2,252,800
32	Apr 17, 2024 19:17	80,400	113,892,030	46,631,922	0	2,236,416
33	Apr 17, 2024 19:20	80,743	118,227,188	46,830,707	0	2,220,032
34	Apr 17, 2024 19:20	80,892	100,850,118	46,917,591	0	2,244,608
35	Apr 17, 2024 19:17	81,287	111,077,144	47,146,243	0	2,236,416
36	Apr 17, 2024 19:17	81,361	109,425,089	47,189,581	0	2,228,224

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