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 listSep 27, 2025 14:27

Wookyung JeongScore: 84,262Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Sep 27, 2025 14:27	75,603	68,456,429	37,871,000	5,979,000	2,379,776
2	Sep 27, 2025 14:27	76,000	67,195,411	39,071,000	5,009,000	2,502,656
3	Sep 27, 2025 14:27	77,771	67,874,964	37,088,000	8,019,000	2,424,832
4	Sep 27, 2025 14:27	78,172	70,300,552	40,303,000	5,037,000	2,322,432
5	Sep 27, 2025 14:27	78,621	67,466,307	40,534,000	5,066,000	2,465,792
6	Sep 27, 2025 14:27	79,298	69,218,242	40,994,000	4,999,000	2,326,528
7	Sep 27, 2025 14:27	80,262	67,504,445	37,444,000	9,108,000	2,318,336
8	Sep 27, 2025 14:27	80,378	68,837,825	41,552,000	5,067,000	2,510,848
9	Sep 27, 2025 14:27	80,993	70,886,278	40,979,000	5,997,000	2,523,136
10	Sep 27, 2025 14:27	81,153	70,347,670	40,059,000	7,010,000	2,351,104
11	Sep 27, 2025 14:27	81,552	69,049,674	41,262,000	6,038,000	2,498,560
12	Sep 27, 2025 14:27	82,652	68,689,192	42,945,000	4,993,000	2,420,736
13	Sep 27, 2025 14:27	82,866	72,186,300	41,053,000	7,009,000	2,519,040
14	Sep 27, 2025 14:27	82,871	71,901,535	39,053,000	9,012,000	2,498,560
15	Sep 27, 2025 14:27	83,493	80,125,181	42,373,000	6,053,000	2,400,256
16	Sep 27, 2025 14:27	84,250	75,730,049	39,890,000	8,975,000	2,273,280
17	Sep 27, 2025 14:27	84,262	70,543,857	41,891,000	6,981,000	2,310,144
18	Sep 27, 2025 14:27	84,360	81,686,879	43,937,000	4,992,000	2,338,816
19	Sep 27, 2025 14:27	85,183	74,321,760	43,357,000	6,049,000	2,265,088
20	Sep 27, 2025 14:27	86,010	71,191,878	40,907,000	8,979,000	2,355,200
21	Sep 27, 2025 14:27	86,076	74,436,661	42,935,000	6,989,000	2,392,064
22	Sep 27, 2025 14:27	86,976	69,976,832	42,375,000	8,071,000	2,310,144
23	Sep 27, 2025 14:27	86,990	76,670,429	42,382,000	8,072,000	2,461,696
24	Sep 27, 2025 14:27	87,729	74,783,446	46,893,000	3,990,000	2,301,952
25	Sep 27, 2025 14:27	87,741	72,464,698	41,910,000	8,980,000	2,486,272
26	Sep 27, 2025 14:27	88,117	74,532,449	40,085,000	11,023,000	2,412,544
27	Sep 27, 2025 14:27	88,422	74,859,774	48,269,000	3,016,000	2,326,528
28	Sep 27, 2025 14:27	89,452	76,844,754	44,898,000	6,984,000	2,428,928
29	Sep 27, 2025 14:27	89,553	73,368,273	46,947,000	4,994,000	2,478,080
30	Sep 27, 2025 14:27	90,183	75,095,533	45,265,000	7,041,000	2,383,872
31	Sep 27, 2025 14:27	90,481	74,639,185	44,406,000	8,073,000	2,314,240
32	Sep 27, 2025 14:27	92,083	79,081,910	42,324,000	11,084,000	2,469,888
33	Sep 27, 2025 14:27	93,890	77,306,497	47,397,000	7,059,000	2,449,408

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