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 26, 2024 20:58

E Sequeira

Score: 78,181

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 26, 2024 20:57	74,781	64,905,536	42,365,000	1,008,000	2,510,848
2	Mar 26, 2024 20:57	74,962	64,336,858	42,467,000	1,011,000	2,281,472
3	Mar 26, 2024 20:57	74,990	66,773,907	42,483,000	1,011,000	2,359,296
4	Mar 26, 2024 20:58	74,995	68,131,198	42,486,000	1,011,000	2,506,752
5	Mar 26, 2024 20:58	75,022	65,624,118	42,502,000	1,011,000	2,289,664
6	Mar 26, 2024 20:58	75,114	66,801,187	42,553,000	1,013,000	2,281,472
7	Mar 26, 2024 20:58	75,153	67,724,981	42,576,000	1,013,000	2,277,376
8	Mar 26, 2024 20:57	75,202	73,809,845	42,603,000	1,014,000	2,277,376
9	Mar 26, 2024 20:57	75,307	69,749,585	42,663,000	1,015,000	2,277,376
10	Mar 26, 2024 20:58	75,326	69,919,089	42,673,000	1,016,000	2,506,752
11	Mar 26, 2024 20:57	75,400	70,619,951	42,715,000	1,017,000	2,510,848
12	Mar 26, 2024 20:58	75,448	72,142,008	42,743,000	1,017,000	2,506,752
13	Mar 26, 2024 20:58	75,478	71,804,212	42,759,000	1,018,000	2,289,664
14	Mar 26, 2024 20:57	75,645	72,078,957	42,877,000	997,000	2,281,472
15	Mar 26, 2024 20:58	75,650	70,669,759	41,883,000	1,994,000	2,277,376
16	Mar 26, 2024 20:57	75,650	67,843,804	41,883,000	1,994,000	2,506,752
17	Mar 26, 2024 20:58	76,038	73,781,704	42,098,000	2,004,000	2,281,472
18	Mar 26, 2024 20:57	76,047	67,740,834	43,105,000	1,002,000	2,277,376
19	Mar 26, 2024 20:57	77,760	70,345,129	45,101,000	0	2,285,568
20	Mar 26, 2024 20:57	77,902	67,536,433	43,175,000	2,008,000	2,351,104
21	Mar 26, 2024 20:58	78,002	69,865,828	43,231,000	2,010,000	2,285,568
22	Mar 26, 2024 20:58	78,181	68,384,477	44,338,000	1,007,000	2,265,088
23	Mar 26, 2024 20:58	78,183	66,360,384	43,331,000	2,015,000	2,502,656
24	Mar 26, 2024 20:58	78,264	71,355,493	44,385,000	1,008,000	2,510,848
25	Mar 26, 2024 20:58	78,293	71,166,829	43,392,000	2,018,000	2,285,568
26	Mar 26, 2024 20:58	78,307	74,660,222	45,418,000	0	2,510,848
27	Mar 26, 2024 20:58	78,310	71,900,998	44,411,000	1,009,000	2,285,568
28	Mar 26, 2024 20:57	78,328	71,504,306	44,421,000	1,009,000	2,285,568
29	Mar 26, 2024 20:58	78,331	64,967,247	44,423,000	1,009,000	2,506,752
30	Mar 26, 2024 20:57	78,362	83,078,500	44,440,000	1,010,000	2,285,568
31	Mar 26, 2024 20:57	78,478	70,434,116	44,528,000	989,000	2,510,848
32	Mar 26, 2024 20:57	78,529	73,790,649	44,535,000	1,012,000	2,506,752
33	Mar 26, 2024 20:57	78,566	71,976,693	44,556,000	1,012,000	2,285,568
34	Mar 26, 2024 20:58	78,853	72,476,789	45,735,000	0	2,506,752
35	Mar 26, 2024 20:57	79,126	74,997,324	44,896,000	997,000	2,510,848
36	Mar 26, 2024 20:57	79,409	69,851,465	44,055,000	2,002,000	2,285,568
37	Mar 26, 2024 20:57	82,470	102,886,344	47,832,647	0	2,232,320
38	Mar 26, 2024 20:58	82,783	109,272,687	48,014,220	0	2,252,800
39	Mar 26, 2024 20:58	83,247	111,426,928	48,283,362	0	2,240,512
40	Mar 26, 2024 20:58	83,348	112,602,023	48,342,095	0	2,228,224
41	Mar 26, 2024 20:57	83,362	112,123,282	48,349,819	0	2,232,320
42	Mar 26, 2024 20:57	83,698	104,475,263	48,545,107	0	2,224,128

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