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 20:41

E Sequeira

Score: 81,274

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 27, 2024 20:41	79,655	67,331,368	44,192,000	2,008,000	2,510,848
2	Mar 27, 2024 20:41	79,690	73,232,640	44,211,000	2,009,000	2,285,568
3	Mar 27, 2024 20:44	80,067	73,715,460	46,439,000	0	2,510,848
4	Mar 27, 2024 20:44	80,350	69,883,373	45,590,000	1,013,000	2,510,848
5	Mar 27, 2024 20:41	80,429	78,044,103	45,635,000	1,014,000	2,510,848
6	Mar 27, 2024 20:44	80,828	72,576,228	44,886,000	1,994,000	2,285,568
7	Mar 27, 2024 20:41	80,840	75,441,237	46,887,000	0	2,273,280
8	Mar 27, 2024 20:41	80,843	73,043,620	44,894,000	1,995,000	2,285,568
9	Mar 27, 2024 20:45	80,859	75,482,420	46,898,000	0	2,519,040
10	Mar 27, 2024 20:44	80,902	71,407,859	44,927,000	1,996,000	2,510,848
11	Mar 27, 2024 20:45	80,950	72,381,193	44,954,000	1,997,000	2,269,184
12	Mar 27, 2024 20:45	80,964	73,550,276	45,960,000	999,000	2,351,104
13	Mar 27, 2024 20:41	80,983	69,087,211	45,971,000	999,000	2,510,848
14	Mar 27, 2024 20:44	81,026	75,781,344	44,996,000	1,999,000	2,285,568
15	Mar 27, 2024 20:41	81,034	73,110,216	46,000,000	1,000,000	2,510,848
16	Mar 27, 2024 20:45	81,155	69,328,752	46,069,000	1,001,000	2,269,184
17	Mar 27, 2024 20:44	81,190	70,069,249	45,087,000	2,003,000	2,285,568
18	Mar 27, 2024 20:45	81,257	69,352,234	45,124,000	2,005,000	2,510,848
19	Mar 27, 2024 20:45	81,274	70,036,613	45,134,000	2,005,000	2,285,568
20	Mar 27, 2024 20:45	81,391	69,365,188	45,199,000	2,008,000	2,506,752
21	Mar 27, 2024 20:44	81,450	70,510,379	45,231,000	2,010,000	2,285,568
22	Mar 27, 2024 20:41	81,567	72,310,713	45,296,000	2,013,000	2,510,848
23	Mar 27, 2024 20:41	81,605	75,111,023	46,324,000	1,007,000	2,285,568
24	Mar 27, 2024 20:44	81,748	67,988,250	46,406,000	1,008,000	2,367,488
25	Mar 27, 2024 20:45	82,097	73,003,079	46,603,000	1,013,000	2,285,568
26	Mar 27, 2024 20:45	82,203	76,249,627	46,664,000	1,014,000	2,342,912
27	Mar 27, 2024 20:44	82,552	74,537,589	45,885,000	1,995,000	2,285,568
28	Mar 27, 2024 20:41	83,147	121,376,209	48,225,445	0	2,220,032
29	Mar 27, 2024 20:44	83,175	114,869,500	48,241,383	0	2,236,416
30	Mar 27, 2024 20:45	83,228	107,029,415	48,272,428	0	2,220,032
31	Mar 27, 2024 20:41	83,251	112,099,076	48,285,603	0	2,232,320
32	Mar 27, 2024 20:44	83,280	114,430,347	48,302,389	0	2,220,032
33	Mar 27, 2024 20:45	83,341	109,604,554	48,337,590	0	2,228,224
34	Mar 27, 2024 20:45	83,354	107,726,052	48,345,421	0	2,228,224
35	Mar 27, 2024 20:44	83,383	108,691,341	48,361,924	0	2,228,224
36	Mar 27, 2024 20:41	83,457	113,831,373	48,404,931	0	2,224,128

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