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.

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Wookyung JeongScore: 62,778Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Sep 27, 2025 20:21	58,338	65,188,436	27,865,000	5,971,000	2,338,816
2	Sep 27, 2025 20:21	58,412	62,486,721	25,908,000	7,971,000	2,498,560
3	Sep 27, 2025 20:21	58,516	56,845,644	28,948,000	4,991,000	2,445,312
4	Sep 27, 2025 20:21	58,964	57,107,314	30,176,000	4,023,000	2,478,080
5	Sep 27, 2025 20:17	58,976	57,125,532	28,170,000	6,036,000	2,326,528
6	Sep 27, 2025 20:21	59,876	64,373,029	28,600,000	6,128,000	2,342,912
7	Sep 27, 2025 20:21	59,945	59,641,090	30,678,000	4,090,000	2,334,720
8	Sep 27, 2025 20:20	60,109	66,248,078	29,883,000	4,980,000	2,502,656
9	Sep 27, 2025 20:19	60,148	60,935,136	31,896,000	2,990,000	2,355,200
10	Sep 27, 2025 20:21	60,545	56,936,071	30,100,000	5,016,000	2,408,448
11	Sep 27, 2025 20:17	60,779	56,688,953	32,231,000	3,021,000	2,392,064
12	Sep 27, 2025 20:24	60,859	61,677,211	29,247,000	6,051,000	2,318,336
13	Sep 27, 2025 20:21	60,926	62,993,167	28,466,000	6,871,000	2,506,752
14	Sep 27, 2025 20:21	60,940	60,495,921	31,306,000	4,039,000	2,478,080
15	Sep 27, 2025 20:19	61,029	57,980,155	26,295,000	9,102,000	2,277,376
16	Sep 27, 2025 20:21	61,047	56,891,257	30,349,000	5,058,000	2,404,352
17	Sep 27, 2025 20:24	61,222	57,023,203	30,437,000	5,072,000	2,265,088
18	Sep 27, 2025 20:21	61,297	58,043,481	27,426,000	8,126,000	2,334,720
19	Sep 27, 2025 20:21	61,909	61,457,674	30,920,000	4,987,000	2,383,872
20	Sep 27, 2025 20:21	62,450	57,912,335	31,191,000	5,030,000	2,297,856
21	Sep 27, 2025 20:21	62,472	58,046,407	33,215,000	3,019,000	2,351,104
22	Sep 27, 2025 20:21	62,571	63,688,137	30,243,000	6,048,000	2,367,488
23	Sep 27, 2025 20:19	62,621	60,266,453	32,285,000	4,035,000	2,416,640
24	Sep 27, 2025 20:21	62,698	61,633,762	31,315,000	5,050,000	2,273,280
25	Sep 27, 2025 20:19	62,778	61,290,378	30,343,000	6,068,000	2,289,664
26	Sep 27, 2025 20:21	62,871	59,956,149	30,388,000	6,077,000	2,310,144
27	Sep 27, 2025 20:21	62,948	58,730,508	33,468,000	3,042,000	2,506,752
28	Sep 27, 2025 20:21	63,183	58,738,830	30,539,000	6,107,000	2,310,144
29	Sep 27, 2025 20:19	63,269	63,096,442	30,580,000	6,116,000	2,347,008
30	Sep 27, 2025 20:21	63,307	66,675,694	31,619,000	5,099,000	2,326,528
31	Sep 27, 2025 20:21	63,314	63,024,678	32,642,000	4,080,000	2,322,432
32	Sep 27, 2025 20:21	63,486	64,833,697	29,856,000	6,966,000	2,359,296
33	Sep 27, 2025 20:21	63,764	63,250,571	28,987,000	7,996,000	2,510,848
34	Sep 27, 2025 20:19	63,772	63,956,503	32,990,000	3,998,000	2,404,352
35	Sep 27, 2025 20:18	63,776	59,895,651	29,992,000	6,998,000	2,461,696
36	Sep 27, 2025 20:17	63,783	63,337,778	32,995,000	3,999,000	2,396,160
37	Sep 27, 2025 20:20	63,872	64,305,112	31,039,000	6,007,000	2,265,088
38	Sep 27, 2025 20:18	64,150	60,826,499	31,174,000	6,033,000	2,306,048
39	Sep 27, 2025 20:24	64,397	59,413,128	30,284,000	7,066,000	2,379,776
40	Sep 27, 2025 20:21	64,760	63,485,335	32,486,000	5,075,000	2,293,760
41	Sep 27, 2025 20:21	64,864	64,954,141	27,453,000	10,168,000	2,490,368
42	Sep 27, 2025 20:19	65,779	66,159,167	32,128,000	6,024,000	2,461,696
43	Sep 27, 2025 20:19	65,798	62,383,341	31,133,000	7,030,000	2,392,064
44	Sep 27, 2025 20:21	66,022	64,015,826	32,247,000	6,046,000	2,465,792
45	Sep 27, 2025 20:19	66,643	64,718,684	32,550,000	6,103,000	2,437,120
46	Sep 27, 2025 20:18	66,981	65,832,083	33,869,000	4,980,000	2,441,216
47	Sep 27, 2025 20:20	67,357	67,873,959	30,052,000	9,015,000	2,433,024
48	Sep 27, 2025 20:21	68,540	63,227,930	31,599,000	8,154,000	2,457,600

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