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: 55,297Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Sep 29, 2025 20:28	51,712	51,625,982	27,994,000	1,999,000	2,297,856
2	Sep 29, 2025 20:29	51,990	57,262,684	27,139,000	3,015,000	2,301,952
3	Sep 29, 2025 20:28	52,091	51,556,990	27,192,000	3,021,000	2,473,984
4	Sep 29, 2025 20:29	52,336	61,543,113	27,320,000	3,035,000	2,281,472
5	Sep 29, 2025 20:30	52,548	56,945,332	27,431,000	3,047,000	2,404,352
6	Sep 29, 2025 20:30	52,552	54,719,097	29,464,000	1,016,000	2,428,928
7	Sep 29, 2025 20:30	53,228	61,329,046	26,889,000	3,983,000	2,306,048
8	Sep 29, 2025 20:30	53,245	63,219,900	27,894,000	2,988,000	2,482,176
9	Sep 29, 2025 20:29	53,269	57,623,070	29,900,000	996,000	2,445,312
10	Sep 29, 2025 20:26	53,362	54,025,468	28,954,000	1,996,000	2,433,024
11	Sep 29, 2025 20:29	53,450	57,363,296	30,001,000	1,000,000	2,469,888
12	Sep 29, 2025 20:26	53,538	57,367,818	29,049,000	2,003,000	2,498,560
13	Sep 29, 2025 20:28	53,569	52,274,585	29,066,000	2,004,000	2,465,792
14	Sep 29, 2025 20:32	53,790	60,572,726	27,173,000	4,025,000	2,486,272
15	Sep 29, 2025 20:28	53,822	54,713,933	28,196,000	3,021,000	2,314,240
16	Sep 29, 2025 20:22	53,967	54,752,760	28,272,000	3,029,000	2,400,256
17	Sep 29, 2025 20:25	54,078	60,187,044	30,354,000	1,011,000	2,314,240
18	Sep 29, 2025 20:28	54,126	56,336,677	29,368,000	2,025,000	2,301,952
19	Sep 29, 2025 20:25	54,136	59,763,596	27,348,000	4,051,000	2,334,720
20	Sep 29, 2025 20:26	54,184	54,264,091	29,400,000	2,027,000	2,314,240
21	Sep 29, 2025 20:22	54,517	55,244,251	29,580,000	2,040,000	2,375,680
22	Sep 29, 2025 20:29	54,559	56,789,861	28,582,000	3,062,000	2,342,912
23	Sep 29, 2025 20:32	54,624	63,081,888	29,638,000	2,044,000	2,265,088
24	Sep 29, 2025 20:27	54,650	57,707,860	30,675,000	1,022,000	2,383,872
25	Sep 29, 2025 20:26	54,983	60,192,007	26,747,000	5,143,000	2,490,368
26	Sep 29, 2025 20:22	55,055	55,195,830	27,941,000	3,991,000	2,482,176
27	Sep 29, 2025 20:29	55,109	54,324,479	28,967,000	2,996,000	2,502,656
28	Sep 29, 2025 20:30	55,297	56,403,423	29,066,000	3,006,000	2,314,240
29	Sep 29, 2025 20:27	55,433	59,508,986	29,137,000	3,014,000	2,506,752
30	Sep 29, 2025 20:29	55,505	58,041,016	31,187,000	1,006,000	2,400,256
31	Sep 29, 2025 20:28	55,526	56,378,345	30,193,000	2,012,000	2,306,048
32	Sep 29, 2025 20:25	55,595	54,637,831	31,238,000	1,007,000	2,478,080
33	Sep 29, 2025 20:25	55,600	57,497,919	30,233,000	2,015,000	2,453,504
34	Sep 29, 2025 20:28	55,624	57,033,749	30,246,000	2,016,000	2,289,664
35	Sep 29, 2025 20:29	55,743	56,642,111	28,290,000	4,041,000	2,277,376
36	Sep 29, 2025 20:29	56,034	55,821,246	28,438,000	4,062,000	2,428,928
37	Sep 29, 2025 20:30	56,124	56,995,831	29,501,000	3,051,000	2,469,888
38	Sep 29, 2025 20:25	56,445	57,907,825	31,715,000	1,023,000	2,301,952
39	Sep 29, 2025 20:27	56,698	59,619,196	30,892,000	1,993,000	2,338,816
40	Sep 29, 2025 20:29	56,707	61,794,492	31,894,000	996,000	2,424,832
41	Sep 29, 2025 20:29	56,734	56,068,524	28,918,000	3,988,000	2,506,752
42	Sep 29, 2025 20:29	56,797	55,508,684	27,951,000	4,991,000	2,510,848
43	Sep 29, 2025 20:29	57,126	55,896,452	32,129,000	1,004,000	2,490,368
44	Sep 29, 2025 20:28	57,195	57,780,991	31,163,000	2,010,000	2,355,200
45	Sep 29, 2025 20:29	57,252	55,680,777	30,188,000	3,018,000	2,326,528
46	Sep 29, 2025 20:25	57,343	57,013,614	30,236,000	3,023,000	2,379,776
47	Sep 29, 2025 20:29	57,467	57,439,462	31,311,000	2,020,000	2,281,472
48	Sep 29, 2025 20:32	57,516	57,232,486	31,338,000	2,021,000	2,371,584
49	Sep 29, 2025 20:29	58,164	62,080,224	31,751,000	1,984,000	2,338,816
50	Sep 29, 2025 20:26	58,402	57,568,563	29,888,000	3,985,000	2,338,816
51	Sep 29, 2025 20:28	59,076	60,295,382	32,249,000	2,015,000	2,502,656
52	Sep 29, 2025 20:29	59,262	58,870,256	31,340,000	3,032,000	2,367,488
53	Sep 29, 2025 20:29	59,603	59,631,713	32,537,000	2,033,000	2,260,992
54	Sep 29, 2025 20:26	59,652	59,268,318	33,581,000	1,017,000	2,306,048

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