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 14, 2026 17:15

Dominique GarmierScore: 76,262Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 14, 2026 16:55	73,100	71,119,138	41,389,000	1,009,000	2,420,736
2	Mar 21, 2026 00:37	73,640	71,794,645	42,711,000	0	2,424,832
3	Mar 14, 2026 17:03	73,710	70,769,440	41,735,000	1,017,000	2,506,752
4	Mar 14, 2026 17:03	73,928	71,755,996	40,884,000	1,994,000	2,506,752
5	Mar 14, 2026 16:55	74,145	71,809,838	41,004,000	2,000,000	2,260,992
6	Mar 14, 2026 17:30	74,367	66,248,962	42,130,000	1,003,000	2,416,640
7	Mar 14, 2026 17:03	74,541	68,164,263	41,224,000	2,010,000	2,416,640
8	Mar 14, 2026 17:03	74,798	70,979,317	42,375,000	1,008,000	2,502,656
9	Mar 14, 2026 16:55	74,943	65,951,930	42,457,000	1,010,000	2,404,352
10	Mar 14, 2026 16:50	74,997	67,864,309	42,487,000	1,011,000	2,506,752
11	Mar 14, 2026 16:55	75,064	66,803,341	42,525,000	1,012,000	2,412,544
12	Mar 14, 2026 17:06	75,078	69,113,634	43,545,000	0	2,506,752
13	Mar 14, 2026 16:55	75,148	66,408,655	42,573,000	1,013,000	2,408,448
14	Mar 14, 2026 17:06	75,350	70,448,028	41,671,000	2,032,000	2,392,064
15	Mar 14, 2026 17:03	75,402	69,763,279	42,716,000	1,017,000	2,506,752
16	Mar 14, 2026 16:50	75,481	71,252,383	43,779,000	0	2,514,944
17	Mar 14, 2026 16:55	75,686	74,168,841	41,903,000	1,995,000	2,379,776
18	Mar 14, 2026 16:50	75,788	70,629,486	41,959,000	1,998,000	2,404,352
19	Mar 21, 2026 00:37	75,890	71,477,216	42,016,000	2,000,000	2,502,656
20	Mar 14, 2026 17:17	76,064	78,424,425	42,112,000	2,005,000	2,486,272
21	Mar 14, 2026 17:03	76,102	72,338,233	42,133,000	2,006,000	2,396,160
22	Mar 14, 2026 17:15	76,198	77,391,036	42,187,000	2,008,000	2,514,944
23	Mar 14, 2026 17:02	76,262	73,671,045	42,222,000	2,010,000	2,519,040
24	Mar 14, 2026 16:50	76,367	70,639,300	42,280,000	2,013,000	2,502,656
25	Mar 14, 2026 17:03	76,500	71,999,089	42,354,000	2,016,000	2,486,272
26	Mar 14, 2026 16:50	76,647	71,451,365	43,445,000	1,010,000	2,486,272
27	Mar 21, 2026 00:37	76,659	70,476,616	43,452,000	1,010,000	2,396,160
28	Mar 14, 2026 17:30	76,781	65,113,337	43,521,000	1,012,000	2,498,560
29	Mar 14, 2026 17:02	76,831	67,843,761	42,537,000	2,025,000	2,506,752
30	Mar 14, 2026 16:55	77,233	72,169,560	42,805,000	1,990,000	2,404,352
31	Mar 14, 2026 16:50	77,378	74,484,901	43,882,000	997,000	2,412,544
32	Mar 14, 2026 16:55	77,388	70,209,069	42,891,000	1,994,000	2,457,600
33	Mar 14, 2026 17:03	77,409	69,578,088	41,904,000	2,993,000	2,514,944
34	Mar 14, 2026 16:55	77,412	75,061,412	42,904,000	1,995,000	2,502,656
35	Mar 14, 2026 17:03	77,448	69,089,879	42,924,000	1,996,000	2,260,992
36	Mar 14, 2026 16:50	77,545	71,549,033	43,977,000	999,000	2,506,752
37	Mar 14, 2026 16:50	77,626	70,806,195	43,022,000	2,001,000	2,506,752
38	Mar 14, 2026 17:02	77,762	70,013,870	44,100,000	1,002,000	2,506,752
39	Mar 14, 2026 17:30	77,788	70,367,324	43,112,000	2,005,000	2,383,872
40	Mar 14, 2026 17:17	77,969	74,403,568	43,213,000	2,009,000	2,371,584
41	Mar 14, 2026 17:17	78,193	71,706,662	44,345,000	1,007,000	2,404,352
42	Mar 14, 2026 17:15	78,253	72,010,002	43,370,000	2,017,000	2,498,560
43	Mar 14, 2026 17:06	78,362	72,893,373	43,430,000	2,020,000	2,506,752
44	Mar 14, 2026 17:15	79,119	70,898,080	44,892,000	997,000	2,375,680
45	Mar 14, 2026 16:50	79,298	78,122,791	43,994,000	1,999,000	2,494,464

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