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: 32,612Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 21, 2025 02:21	30,503	47,595,677	17,692,000	0	2,531,328
2	Dec 21, 2025 02:21	31,072	39,926,707	16,020,000	2,002,000	2,506,752
3	Dec 21, 2025 02:25	31,121	46,964,974	18,050,000	0	2,510,848
4	Dec 21, 2025 02:21	31,134	43,478,854	17,055,000	1,003,000	2,502,656
5	Dec 21, 2025 02:22	31,207	41,952,869	17,095,000	1,005,000	2,523,136
6	Dec 21, 2025 02:25	31,253	41,175,625	16,113,000	2,014,000	2,326,528
7	Dec 21, 2025 02:25	31,331	48,663,819	16,153,000	2,019,000	2,306,048
8	Dec 21, 2025 02:21	31,626	37,585,403	18,343,000	0	2,318,336
9	Dec 21, 2025 02:25	31,695	40,486,550	18,383,000	0	2,519,040
10	Dec 21, 2025 02:21	31,698	35,448,556	18,385,000	0	2,334,720
11	Dec 21, 2025 02:25	31,728	38,119,860	17,380,000	1,022,000	2,494,464
12	Dec 21, 2025 02:22	31,729	41,216,484	18,403,000	0	2,494,464
13	Dec 21, 2025 02:21	31,750	38,935,085	18,415,000	0	2,318,336
14	Dec 21, 2025 02:21	31,791	40,177,328	17,415,000	1,024,000	2,326,528
15	Dec 21, 2025 02:21	31,817	39,877,950	17,429,000	1,025,000	2,519,040
16	Dec 21, 2025 02:25	31,847	41,703,868	17,445,000	1,026,000	2,326,528
17	Dec 21, 2025 02:23	32,109	43,209,543	18,623,000	0	2,334,720
18	Dec 21, 2025 02:21	32,112	38,847,846	17,591,000	1,034,000	2,408,448
19	Dec 21, 2025 02:22	32,186	40,115,333	18,668,000	0	2,506,752
20	Dec 21, 2025 02:25	32,228	46,510,016	17,654,000	1,038,000	2,318,336
21	Dec 21, 2025 02:23	32,252	48,628,996	17,667,000	1,039,000	2,326,528
22	Dec 21, 2025 02:21	32,266	43,012,882	18,714,000	0	2,297,856
23	Dec 21, 2025 02:25	32,595	43,258,153	17,910,000	995,000	2,297,856
24	Dec 21, 2025 02:21	32,598	43,311,570	17,912,000	995,000	2,293,760
25	Dec 21, 2025 02:21	32,610	38,988,395	18,914,000	0	2,326,528
26	Dec 21, 2025 02:21	32,612	44,906,963	17,920,000	995,000	2,478,080
27	Dec 21, 2025 02:23	32,624	45,432,460	17,927,000	995,000	2,494,464
28	Dec 21, 2025 02:24	32,633	46,190,317	17,931,000	996,000	2,506,752
29	Dec 21, 2025 02:22	32,959	37,460,003	18,110,000	1,006,000	2,510,848
30	Dec 21, 2025 02:21	33,038	40,297,996	18,154,000	1,008,000	2,338,816
31	Dec 21, 2025 02:21	33,093	44,655,247	17,174,000	2,020,000	2,285,568
32	Dec 21, 2025 02:24	33,141	34,388,875	18,211,000	1,011,000	2,310,144
33	Dec 21, 2025 02:24	33,207	42,524,250	17,233,000	2,027,000	2,437,120
34	Dec 21, 2025 02:23	33,214	41,996,468	18,251,000	1,013,000	2,498,560
35	Dec 21, 2025 02:25	33,240	44,127,079	18,265,000	1,014,000	2,502,656
36	Dec 21, 2025 02:25	33,600	35,796,851	18,463,000	1,025,000	2,297,856
37	Dec 21, 2025 02:21	33,691	35,863,470	18,513,000	1,028,000	2,478,080
38	Dec 21, 2025 02:21	33,738	38,004,037	18,539,000	1,029,000	2,465,792
39	Dec 21, 2025 02:23	33,884	42,622,335	19,653,000	0	2,449,408
40	Dec 21, 2025 02:22	34,081	47,597,482	18,727,000	1,040,000	2,502,656
41	Dec 21, 2025 02:21	34,288	44,059,629	17,899,000	1,988,000	2,510,848
42	Dec 21, 2025 02:25	34,307	45,921,630	17,909,000	1,989,000	2,510,848
43	Dec 21, 2025 02:23	34,310	37,124,915	17,910,000	1,990,000	2,478,080
44	Dec 21, 2025 02:22	34,316	48,465,084	17,913,000	1,990,000	2,535,424
45	Dec 21, 2025 02:21	34,316	45,521,164	17,913,000	1,990,000	2,301,952
46	Dec 21, 2025 02:21	34,316	47,776,208	17,913,000	1,990,000	2,519,040
47	Dec 21, 2025 02:25	34,317	50,487,934	18,909,000	995,000	2,457,600
48	Dec 21, 2025 02:25	34,319	49,481,818	17,915,000	1,990,000	2,461,696
49	Dec 21, 2025 02:21	34,329	48,213,654	18,916,000	995,000	2,441,216
50	Dec 21, 2025 02:25	34,560	43,069,412	18,041,000	2,004,000	2,510,848
51	Dec 21, 2025 02:25	34,609	38,126,826	18,066,000	2,007,000	2,371,584

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