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 15:09

E Sequeira

Score: 77,403

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 27, 2024 15:11	75,652	71,961,787	41,884,000	1,994,000	2,285,568
2	Mar 27, 2024 15:10	75,733	67,031,822	42,904,000	1,021,000	2,510,848
3	Mar 27, 2024 15:10	75,836	68,155,361	41,986,000	1,999,000	2,285,568
4	Mar 27, 2024 15:10	75,881	68,282,351	43,011,000	1,000,000	2,510,848
5	Mar 27, 2024 15:09	75,934	74,154,896	42,041,000	2,001,000	2,285,568
6	Mar 27, 2024 15:10	75,984	66,761,849	42,068,000	2,003,000	2,281,472
7	Mar 27, 2024 15:10	76,338	73,889,181	42,264,000	2,012,000	2,510,848
8	Mar 27, 2024 15:11	76,472	68,855,588	42,338,000	2,016,000	2,371,584
9	Mar 27, 2024 15:10	76,486	66,733,253	43,354,000	1,008,000	2,285,568
10	Mar 27, 2024 15:09	76,531	71,456,640	42,371,000	2,017,000	2,519,040
11	Mar 27, 2024 15:10	76,588	73,166,226	43,412,000	1,009,000	2,285,568
12	Mar 27, 2024 15:11	76,691	67,463,353	44,481,000	0	2,510,848
13	Mar 27, 2024 15:09	76,712	69,064,787	43,482,000	1,011,000	2,510,848
14	Mar 27, 2024 15:11	76,816	67,735,398	43,541,000	1,012,000	2,519,040
15	Mar 27, 2024 15:10	77,017	75,209,643	44,670,000	0	2,519,040
16	Mar 27, 2024 15:11	77,081	70,480,193	43,691,000	1,016,000	2,510,848
17	Mar 27, 2024 15:09	77,384	71,789,441	42,889,000	1,994,000	2,285,568
18	Mar 27, 2024 15:11	77,397	70,323,074	42,895,000	1,995,000	2,285,568
19	Mar 27, 2024 15:09	77,403	73,794,553	42,899,000	1,995,000	2,273,280
20	Mar 27, 2024 15:11	77,428	72,131,304	43,888,000	1,020,000	2,265,088
21	Mar 27, 2024 15:09	77,452	67,633,883	42,926,000	1,996,000	2,285,568
22	Mar 27, 2024 15:11	77,559	68,676,733	42,985,000	1,999,000	2,359,296
23	Mar 27, 2024 15:10	77,564	67,456,586	42,988,000	1,999,000	2,510,848
24	Mar 27, 2024 15:09	77,626	71,047,778	43,022,000	2,001,000	2,519,040
25	Mar 27, 2024 15:09	77,736	68,596,854	43,084,000	2,003,000	2,510,848
26	Mar 27, 2024 15:09	77,838	71,938,186	43,140,000	2,006,000	2,265,088
27	Mar 27, 2024 15:11	78,152	72,016,366	44,321,000	1,007,000	2,510,848
28	Mar 27, 2024 15:10	79,532	105,902,521	46,128,408	0	2,228,224
29	Mar 27, 2024 15:10	79,625	123,343,609	46,182,371	0	2,240,512
30	Mar 27, 2024 15:11	79,843	106,742,678	46,308,785	0	2,232,320
31	Mar 27, 2024 15:09	80,084	123,913,913	46,448,537	0	2,228,224
32	Mar 27, 2024 15:11	80,134	112,808,576	46,477,498	0	2,232,320
33	Mar 27, 2024 15:11	80,321	105,734,179	46,586,464	0	2,240,512
34	Mar 27, 2024 15:09	80,512	121,633,774	46,696,953	0	2,240,512
35	Mar 27, 2024 15:09	81,107	107,825,270	47,042,282	0	2,228,224
36	Mar 27, 2024 15:10	81,317	109,461,811	47,163,797	0	2,248,704

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