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: 62,510Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Sep 27, 2025 19:53	59,212	64,902,383	28,283,000	6,060,000	2,473,984
2	Sep 27, 2025 19:51	59,321	56,975,082	29,347,000	5,059,000	2,277,376
3	Sep 27, 2025 19:50	59,503	63,583,924	29,437,000	5,075,000	2,494,464
4	Sep 27, 2025 19:51	59,652	57,317,325	29,510,000	5,088,000	2,371,584
5	Sep 27, 2025 19:53	60,141	61,086,663	31,893,000	2,989,000	2,392,064
6	Sep 27, 2025 19:51	60,269	57,900,445	29,963,000	4,993,000	2,469,888
7	Sep 27, 2025 19:51	60,316	58,081,112	30,985,000	3,998,000	2,367,488
8	Sep 27, 2025 19:53	60,329	57,249,671	32,992,000	1,999,000	2,445,312
9	Sep 27, 2025 19:53	60,516	57,571,617	29,082,000	6,017,000	2,367,488
10	Sep 27, 2025 19:53	60,738	57,031,670	30,196,000	5,032,000	2,445,312
11	Sep 27, 2025 19:50	60,971	57,701,787	31,322,000	4,041,000	2,490,368
12	Sep 27, 2025 19:53	61,038	57,770,471	29,333,000	6,069,000	2,416,640
13	Sep 27, 2025 19:53	61,117	63,031,225	28,359,000	7,089,000	2,428,928
14	Sep 27, 2025 19:53	61,126	58,649,397	32,415,000	3,038,000	2,310,144
15	Sep 27, 2025 19:53	61,443	61,647,241	32,583,000	3,054,000	2,437,120
16	Sep 27, 2025 19:51	61,512	68,947,916	27,523,000	8,154,000	2,437,120
17	Sep 27, 2025 19:50	61,564	59,418,179	30,606,000	5,101,000	2,453,504
18	Sep 27, 2025 19:53	61,612	63,109,775	29,609,000	6,126,000	2,424,832
19	Sep 27, 2025 19:50	61,812	64,116,316	27,884,000	7,967,000	2,519,040
20	Sep 27, 2025 19:53	61,888	61,206,824	29,913,000	5,982,000	2,498,560
21	Sep 27, 2025 19:51	61,900	60,769,933	30,916,000	4,986,000	2,441,216
22	Sep 27, 2025 19:50	61,907	63,990,642	27,927,000	7,979,000	2,420,736
23	Sep 27, 2025 19:52	61,926	61,008,687	30,929,000	4,988,000	2,367,488
24	Sep 27, 2025 19:53	62,019	61,635,103	28,977,000	6,994,000	2,420,736
25	Sep 27, 2025 19:53	62,066	58,087,589	29,999,000	5,999,000	2,285,568
26	Sep 27, 2025 19:53	62,084	56,469,879	31,008,000	5,001,000	2,433,024
27	Sep 27, 2025 19:53	62,159	60,582,894	32,047,000	4,005,000	2,482,176
28	Sep 27, 2025 19:53	62,200	60,235,170	31,066,000	5,010,000	2,306,048
29	Sep 27, 2025 19:52	62,229	65,223,672	33,086,000	3,007,000	2,359,296
30	Sep 27, 2025 19:51	62,260	64,135,614	31,096,000	5,015,000	2,519,040
31	Sep 27, 2025 19:53	62,510	58,934,718	31,221,000	5,035,000	2,400,256
32	Sep 27, 2025 19:51	62,514	59,435,190	32,230,000	4,028,000	2,457,600
33	Sep 27, 2025 19:52	62,924	62,513,334	32,441,000	4,055,000	2,478,080
34	Sep 27, 2025 19:51	63,557	62,457,451	31,882,000	4,981,000	2,355,200
35	Sep 27, 2025 19:52	63,593	66,040,479	32,897,000	3,987,000	2,494,464
36	Sep 27, 2025 19:53	63,617	62,144,987	33,907,000	2,991,000	2,330,624
37	Sep 27, 2025 19:51	63,698	60,579,780	30,954,000	5,991,000	2,428,928
38	Sep 27, 2025 19:53	63,738	59,334,631	27,976,000	8,992,000	2,437,120
39	Sep 27, 2025 19:53	63,826	63,634,912	29,015,000	8,004,000	2,465,792
40	Sep 27, 2025 19:53	63,902	60,151,675	29,050,000	8,013,000	2,371,584
41	Sep 27, 2025 19:51	63,909	64,221,373	32,058,000	5,009,000	2,347,008
42	Sep 27, 2025 19:53	63,917	60,046,417	31,061,000	6,011,000	2,387,968
43	Sep 27, 2025 19:51	64,257	62,347,286	31,226,000	6,043,000	2,461,696
44	Sep 27, 2025 19:52	64,362	59,790,046	31,277,000	6,053,000	2,338,816
45	Sep 27, 2025 19:52	64,362	59,437,083	28,250,000	9,080,000	2,363,392
46	Sep 27, 2025 19:52	64,705	63,976,936	29,415,000	8,114,000	2,367,488
47	Sep 27, 2025 19:53	64,728	64,267,346	33,484,000	4,058,000	2,445,312
48	Sep 27, 2025 19:51	64,767	60,817,883	32,489,000	5,076,000	2,314,240
49	Sep 27, 2025 19:52	64,878	63,408,293	31,527,000	6,102,000	2,490,368
50	Sep 27, 2025 19:53	64,897	68,535,458	33,571,000	4,069,000	2,465,792
51	Sep 27, 2025 19:53	64,962	64,106,425	30,550,000	7,128,000	2,326,528
52	Sep 27, 2025 19:53	64,969	61,573,156	29,535,000	8,147,000	2,433,024
53	Sep 27, 2025 19:51	65,191	59,182,502	32,836,000	4,975,000	2,433,024
54	Sep 27, 2025 19:53	65,484	67,996,442	28,986,000	8,995,000	2,322,432
55	Sep 27, 2025 19:53	65,771	66,712,974	32,124,000	6,023,000	2,519,040
56	Sep 27, 2025 19:52	65,852	64,107,558	33,169,000	5,025,000	2,342,912
57	Sep 27, 2025 19:50	65,886	60,770,985	33,186,000	5,028,000	2,453,504
58	Sep 27, 2025 19:51	66,200	63,433,773	32,334,000	6,062,000	2,424,832
59	Sep 27, 2025 19:53	66,343	61,312,195	31,391,000	7,088,000	2,428,928
60	Sep 27, 2025 19:53	67,276	67,772,856	33,017,000	6,003,000	2,494,464

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