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 26, 2024 21:15

E Sequeira

Score: 79,228

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 26, 2024 21:15	75,157	65,032,549	42,578,000	1,013,000	2,510,848
2	Mar 26, 2024 21:15	75,269	64,372,315	43,656,000	0	2,273,280
3	Mar 26, 2024 21:15	75,683	69,633,610	41,901,000	1,995,000	2,293,760
4	Mar 26, 2024 21:15	75,697	66,127,807	41,909,000	1,995,000	2,510,848
5	Mar 26, 2024 21:15	75,798	74,249,552	42,964,000	999,000	2,523,136
6	Mar 27, 2024 09:24	75,869	71,947,607	42,004,000	2,000,000	2,277,376
7	Mar 26, 2024 21:15	75,881	81,813,364	42,011,000	2,000,000	2,519,040
8	Mar 27, 2024 09:24	75,886	71,261,236	43,014,000	1,000,000	2,285,568
9	Mar 26, 2024 21:15	75,910	71,815,981	42,027,000	2,001,000	2,281,472
10	Mar 26, 2024 21:15	75,993	68,214,189	42,073,000	2,003,000	2,289,664
11	Mar 26, 2024 21:15	76,083	69,216,376	42,123,000	2,005,000	2,523,136
12	Mar 26, 2024 21:15	76,110	71,460,736	42,138,000	2,006,000	2,281,472
13	Mar 27, 2024 09:24	76,124	70,726,943	42,146,000	2,006,000	2,289,664
14	Mar 26, 2024 21:15	76,217	69,972,323	43,202,000	1,004,000	2,510,848
15	Mar 26, 2024 21:15	76,724	72,542,955	43,489,000	1,011,000	2,281,472
16	Mar 26, 2024 21:15	78,719	76,130,327	45,657,000	0	2,273,280
17	Mar 26, 2024 21:15	78,728	74,052,004	44,648,000	1,014,000	2,285,568
18	Mar 26, 2024 21:15	78,852	70,556,974	44,718,000	1,016,000	2,506,752
19	Mar 27, 2024 09:24	78,905	72,752,864	44,748,000	1,017,000	2,510,848
20	Mar 26, 2024 21:15	79,122	72,291,743	44,894,000	997,000	2,260,992
21	Mar 26, 2024 21:15	79,133	77,263,025	43,902,000	1,995,000	2,285,568
22	Mar 27, 2024 09:24	79,133	71,805,428	43,902,000	1,995,000	2,510,848
23	Mar 26, 2024 21:15	79,195	69,734,409	43,936,000	1,997,000	2,519,040
24	Mar 26, 2024 21:15	79,207	71,554,945	44,942,000	998,000	2,510,848
25	Mar 26, 2024 21:15	79,209	76,052,108	44,943,000	998,000	2,510,848
26	Mar 26, 2024 21:15	79,228	69,628,918	43,955,000	1,997,000	2,510,848
27	Mar 27, 2024 09:24	79,264	69,816,203	43,975,000	1,998,000	2,285,568
28	Mar 26, 2024 21:15	79,393	70,547,957	44,046,000	2,002,000	2,265,088
29	Mar 26, 2024 21:15	79,419	71,449,547	44,061,000	2,002,000	2,285,568
30	Mar 27, 2024 09:24	79,419	72,021,209	45,062,000	1,001,000	2,519,040
31	Mar 27, 2024 09:24	79,424	70,517,521	44,064,000	2,002,000	2,519,040
32	Mar 27, 2024 09:24	79,462	68,965,089	44,085,000	2,003,000	2,285,568
33	Mar 26, 2024 21:15	79,483	71,528,184	44,096,000	2,004,000	2,260,992
34	Mar 26, 2024 21:15	79,564	69,793,796	45,144,000	1,003,000	2,285,568
35	Mar 27, 2024 09:24	79,566	68,693,973	44,142,000	2,006,000	2,260,992
36	Mar 26, 2024 21:15	79,583	70,235,169	44,152,000	2,006,000	2,285,568
37	Mar 26, 2024 21:15	79,741	69,767,013	44,240,000	2,010,000	2,285,568
38	Mar 27, 2024 09:24	79,790	71,795,845	44,266,000	2,012,000	2,510,848
39	Mar 26, 2024 21:15	79,893	75,002,200	44,324,000	2,014,000	2,285,568
40	Mar 27, 2024 09:24	79,997	68,799,826	45,390,000	1,008,000	2,285,568
41	Mar 26, 2024 21:15	80,007	69,590,202	45,396,000	1,008,000	2,285,568
42	Mar 26, 2024 21:15	80,160	79,116,507	45,483,000	1,010,000	2,519,040
43	Mar 27, 2024 09:24	82,235	102,998,432	47,696,264	0	2,228,224
44	Mar 26, 2024 21:15	82,545	104,756,356	47,876,328	0	2,236,416
45	Mar 27, 2024 09:24	82,675	129,468,298	47,951,394	0	2,228,224
46	Mar 26, 2024 21:15	82,959	119,164,350	48,116,286	0	2,224,128
47	Mar 26, 2024 21:15	83,219	112,036,569	48,267,036	0	2,240,512
48	Mar 27, 2024 09:24	83,345	115,321,286	48,340,276	0	2,236,416
49	Mar 26, 2024 21:15	83,635	109,218,233	48,508,353	0	2,228,224
50	Mar 26, 2024 21:15	83,845	123,967,472	48,630,369	0	2,224,128
51	Mar 26, 2024 21:15	84,261	107,458,171	48,871,407	0	2,232,320

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