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 16:40

E Sequeira

Score: 84,700

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 26, 2024 16:44	84,286	77,477,242	46,891,000	1,995,000	2,285,568
2	Mar 26, 2024 16:44	84,286	77,847,623	46,891,000	1,995,000	2,510,848
3	Mar 26, 2024 16:40	84,291	76,921,856	47,892,000	997,000	2,510,848
4	Mar 26, 2024 16:47	84,297	80,159,341	46,897,000	1,995,000	2,289,664
5	Mar 26, 2024 16:40	84,307	76,450,817	46,903,000	1,995,000	2,289,664
6	Mar 26, 2024 16:40	84,367	106,779,222	48,933,136	0	2,207,744
7	Mar 26, 2024 16:40	84,372	82,408,262	46,939,000	1,997,000	2,285,568
8	Mar 26, 2024 16:47	84,393	77,025,957	46,951,000	1,997,000	2,502,656
9	Mar 26, 2024 16:40	84,402	71,901,613	46,955,000	1,998,000	2,289,664
10	Mar 26, 2024 16:44	84,403	78,677,762	46,956,000	1,998,000	2,510,848
11	Mar 26, 2024 16:47	84,426	77,670,519	47,968,000	999,000	2,510,848
12	Mar 26, 2024 16:47	84,452	85,903,720	46,983,000	1,999,000	2,285,568
13	Mar 26, 2024 16:47	84,464	73,300,244	47,990,000	999,000	2,510,848
14	Mar 26, 2024 16:44	84,507	78,177,374	47,014,000	2,000,000	2,289,664
15	Mar 26, 2024 16:47	84,552	71,079,210	47,039,000	2,001,000	2,510,848
16	Mar 26, 2024 16:40	84,588	78,663,780	47,059,000	2,002,000	2,506,752
17	Mar 26, 2024 16:44	84,602	76,812,160	48,068,000	1,001,000	2,289,664
18	Mar 26, 2024 16:40	84,608	110,814,007	49,072,611	0	2,211,840
19	Mar 26, 2024 16:47	84,624	71,983,278	48,081,000	1,001,000	2,363,392
20	Mar 26, 2024 16:44	84,624	75,680,434	48,081,000	1,001,000	2,510,848
21	Mar 26, 2024 16:40	84,676	72,493,281	47,108,000	2,004,000	2,510,848
22	Mar 26, 2024 16:47	84,678	72,965,092	47,109,000	2,004,000	2,514,944
23	Mar 26, 2024 16:47	84,691	72,688,294	48,119,000	1,002,000	2,285,568
24	Mar 26, 2024 16:47	84,695	74,758,870	47,118,000	2,005,000	2,510,848
25	Mar 26, 2024 16:47	84,700	71,616,759	47,121,000	2,005,000	2,289,664
26	Mar 26, 2024 16:40	84,716	74,912,629	47,130,000	2,005,000	2,285,568
27	Mar 26, 2024 16:44	84,914	69,804,786	47,240,000	2,010,000	2,514,944
28	Mar 26, 2024 16:44	84,939	128,660,733	49,264,695	0	2,224,128
29	Mar 26, 2024 16:47	84,980	110,764,813	49,288,401	0	2,207,744
30	Mar 26, 2024 16:47	85,057	74,829,179	49,333,000	0	2,289,664
31	Mar 26, 2024 16:40	85,060	71,596,034	49,335,000	0	2,289,664
32	Mar 26, 2024 16:47	85,178	78,866,460	48,395,000	1,008,000	2,510,848
33	Mar 26, 2024 16:40	85,212	71,418,147	48,415,000	1,008,000	2,289,664
34	Mar 26, 2024 16:47	85,219	72,537,951	48,419,000	1,008,000	2,506,752
35	Mar 26, 2024 16:47	85,255	79,467,842	48,439,000	1,009,000	2,510,848
36	Mar 26, 2024 16:44	85,333	110,629,119	49,492,859	0	2,211,840
37	Mar 26, 2024 16:44	85,333	104,504,433	49,492,938	0	2,207,744
38	Mar 26, 2024 16:47	85,346	137,602,030	49,500,489	0	2,211,840
39	Mar 26, 2024 16:44	85,403	74,370,889	49,534,000	0	2,289,664
40	Mar 26, 2024 16:47	85,503	77,265,197	48,580,000	1,012,000	2,289,664
41	Mar 26, 2024 16:40	85,512	101,596,836	49,597,182	0	2,224,128
42	Mar 26, 2024 16:47	85,522	73,117,395	49,603,000	0	2,289,664
43	Mar 26, 2024 16:47	85,589	117,080,264	49,641,484	0	2,215,936
44	Mar 26, 2024 16:47	85,595	106,679,347	49,645,028	0	2,215,936
45	Mar 26, 2024 16:47	85,602	82,472,815	48,636,000	1,013,000	2,289,664
46	Mar 26, 2024 16:44	85,622	74,000,879	49,661,000	0	2,289,664
47	Mar 26, 2024 16:47	85,635	108,895,765	49,668,270	0	2,215,936
48	Mar 26, 2024 16:47	85,702	108,365,863	49,707,195	0	2,215,936

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