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: 41,884Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 16, 2025 23:30	37,021	42,963,249	20,450,000	1,022,000	2,330,624
2	Dec 16, 2025 23:29	38,736	47,557,455	22,467,000	0	2,502,656
3	Dec 16, 2025 23:30	39,067	49,129,028	22,659,000	0	2,269,184
4	Dec 16, 2025 23:29	39,071	49,335,050	21,631,000	1,030,000	2,531,328
5	Dec 16, 2025 23:30	39,500	51,508,052	21,914,000	996,000	2,269,184
6	Dec 16, 2025 23:29	39,779	47,519,870	22,069,000	1,003,000	2,269,184
7	Dec 16, 2025 23:30	39,790	47,210,177	21,072,000	2,006,000	2,506,752
8	Dec 16, 2025 23:29	39,833	46,748,867	21,094,000	2,009,000	2,494,464
9	Dec 16, 2025 23:30	39,853	49,614,635	21,105,000	2,010,000	2,269,184
10	Dec 16, 2025 23:30	40,033	46,072,200	21,200,000	2,019,000	2,506,752
11	Dec 16, 2025 23:30	40,395	51,097,421	22,411,000	1,018,000	2,506,752
12	Dec 16, 2025 23:30	40,460	51,160,658	21,427,000	2,040,000	2,531,328
13	Dec 16, 2025 23:30	41,133	50,963,593	22,863,000	994,000	2,531,328
14	Dec 16, 2025 23:29	41,421	53,342,323	22,022,000	2,002,000	2,527,232
15	Dec 16, 2025 23:30	41,438	44,645,641	23,033,000	1,001,000	2,527,232
16	Dec 16, 2025 23:30	41,595	49,510,998	23,120,000	1,005,000	2,506,752
17	Dec 16, 2025 23:30	41,629	45,849,685	22,133,000	2,012,000	2,330,624
18	Dec 16, 2025 23:29	41,731	46,262,702	22,187,000	2,017,000	2,527,232
19	Dec 16, 2025 23:29	41,884	45,556,993	22,269,000	2,024,000	2,527,232
20	Dec 16, 2025 23:29	41,967	48,546,237	24,341,000	0	2,506,752
21	Dec 16, 2025 23:29	42,397	47,550,921	23,566,000	1,024,000	2,502,656
22	Dec 16, 2025 23:30	42,424	49,621,956	23,581,000	1,025,000	2,527,232
23	Dec 16, 2025 23:30	42,452	48,017,176	23,597,000	1,025,000	2,330,624
24	Dec 16, 2025 23:29	42,779	53,790,676	24,812,000	0	2,498,560
25	Dec 16, 2025 23:30	42,867	49,443,539	24,863,000	0	2,527,232
26	Dec 16, 2025 23:30	42,910	49,815,965	23,893,000	995,000	2,527,232
27	Dec 16, 2025 23:29	42,938	46,490,241	24,904,000	0	2,527,232
28	Dec 16, 2025 23:30	42,998	47,771,239	23,942,000	997,000	2,498,560
29	Dec 16, 2025 23:29	43,055	47,845,693	23,974,000	998,000	2,269,184
30	Dec 16, 2025 23:30	43,209	46,497,909	24,059,000	1,002,000	2,502,656
31	Dec 16, 2025 23:29	43,243	50,128,761	24,078,000	1,003,000	2,494,464
32	Dec 16, 2025 23:30	43,252	50,397,114	24,083,000	1,003,000	2,527,232
33	Dec 16, 2025 23:29	43,545	45,214,709	23,236,000	2,020,000	2,527,232
34	Dec 16, 2025 23:29	43,566	52,445,146	24,258,000	1,010,000	2,269,184
35	Dec 16, 2025 23:30	43,686	47,549,773	23,311,000	2,027,000	2,527,232
36	Dec 16, 2025 23:30	43,931	51,118,264	25,480,000	0	2,502,656

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