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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HattonuriScore: 31,047Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 22, 2025 00:30	29,847	33,093,659	16,293,000	1,018,000	2,342,912
2	Dec 22, 2025 00:28	29,909	43,060,673	17,347,000	0	2,330,624
3	Dec 22, 2025 00:28	29,955	42,892,782	17,374,000	0	2,326,528
4	Dec 22, 2025 00:30	30,064	38,479,713	16,412,000	1,025,000	2,506,752
5	Dec 22, 2025 00:29	30,128	38,048,220	17,474,000	0	2,461,696
6	Dec 22, 2025 00:28	30,183	45,020,808	17,506,000	0	2,519,040
7	Dec 22, 2025 00:28	30,197	33,882,064	17,514,000	0	2,510,848
8	Dec 22, 2025 00:28	30,248	33,458,734	17,544,000	0	2,523,136
9	Dec 22, 2025 00:30	30,355	40,065,883	17,606,000	0	2,510,848
10	Dec 22, 2025 00:30	30,448	41,922,957	17,660,000	0	2,510,848
11	Dec 22, 2025 00:30	30,476	30,994,462	17,676,000	0	2,297,856
12	Dec 22, 2025 00:29	30,502	35,521,307	17,691,000	0	2,510,848
13	Dec 22, 2025 00:30	30,543	37,797,762	17,715,000	0	2,310,144
14	Dec 22, 2025 00:30	30,653	41,124,821	17,779,000	0	2,338,816
15	Dec 22, 2025 00:28	30,866	39,030,446	17,902,000	0	2,322,432
16	Dec 22, 2025 00:30	30,867	45,076,260	16,909,000	994,000	2,486,272
17	Dec 22, 2025 00:34	30,874	37,567,939	15,918,000	1,989,000	2,469,888
18	Dec 22, 2025 00:30	30,881	43,483,107	16,916,000	995,000	2,326,528
19	Dec 22, 2025 00:29	30,881	43,555,962	16,916,000	995,000	2,510,848
20	Dec 22, 2025 00:34	30,881	45,120,354	15,921,000	1,990,000	2,306,048
21	Dec 22, 2025 00:30	30,891	34,285,702	16,922,000	995,000	2,519,040
22	Dec 22, 2025 00:34	30,917	41,600,283	16,936,000	996,000	2,523,136
23	Dec 22, 2025 00:34	30,969	38,924,089	16,965,000	997,000	2,326,528
24	Dec 22, 2025 00:29	30,976	42,659,088	16,968,000	998,000	2,301,952
25	Dec 22, 2025 00:30	31,028	41,415,388	17,996,000	0	2,523,136
26	Dec 22, 2025 00:34	31,047	38,486,330	17,007,000	1,000,000	2,306,048
27	Dec 22, 2025 00:28	31,097	47,257,522	17,034,000	1,002,000	2,490,368
28	Dec 22, 2025 00:28	31,105	46,580,417	17,039,000	1,002,000	2,289,664
29	Dec 22, 2025 00:30	31,112	41,070,770	17,043,000	1,002,000	2,506,752
30	Dec 22, 2025 00:30	31,229	41,294,818	17,107,000	1,006,000	2,457,600
31	Dec 22, 2025 00:30	31,274	41,254,505	17,132,000	1,007,000	2,293,760
32	Dec 22, 2025 00:30	31,300	38,620,076	17,146,000	1,008,000	2,486,272
33	Dec 22, 2025 00:30	31,316	38,814,305	16,145,000	2,018,000	2,400,256
34	Dec 22, 2025 00:29	31,371	41,709,054	16,174,000	2,021,000	2,400,256
35	Dec 22, 2025 00:30	31,379	39,892,977	17,189,000	1,011,000	2,330,624
36	Dec 22, 2025 00:28	31,412	32,798,643	16,195,000	2,024,000	2,535,424
37	Dec 22, 2025 00:31	31,524	46,714,676	18,284,000	0	2,293,760
38	Dec 22, 2025 00:28	31,605	51,325,621	18,331,000	0	2,281,472
39	Dec 22, 2025 00:34	31,610	37,189,709	17,316,000	1,018,000	2,490,368
40	Dec 22, 2025 00:30	31,624	41,744,703	17,323,000	1,019,000	2,306,048
41	Dec 22, 2025 00:29	31,709	45,935,900	17,370,000	1,021,000	2,506,752
42	Dec 22, 2025 00:28	31,743	37,358,895	18,411,000	0	2,281,472
43	Dec 22, 2025 00:30	31,831	35,512,045	17,437,000	1,025,000	2,400,256
44	Dec 22, 2025 00:31	31,845	37,153,590	17,444,000	1,026,000	2,523,136
45	Dec 22, 2025 00:28	31,993	43,511,057	17,526,000	1,030,000	2,453,504
46	Dec 22, 2025 00:28	32,007	42,609,008	18,564,000	0	2,428,928
47	Dec 22, 2025 00:30	32,010	37,461,807	18,566,000	0	2,355,200
48	Dec 22, 2025 00:30	32,076	39,222,415	17,571,000	1,033,000	2,437,120
49	Dec 22, 2025 00:28	32,607	45,223,921	18,912,000	0	2,486,272
50	Dec 22, 2025 00:31	32,710	40,206,996	17,974,000	998,000	2,482,176
51	Dec 22, 2025 00:28	32,895	46,147,220	17,071,000	2,008,000	2,453,504

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