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 listDec 5, 2023 07:43

Sergey Stremin

Score: 75,384

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 5, 2023 07:43	73,945	73,597,035	41,891,000	997,000	2,338,816
2	Dec 5, 2023 07:47	74,107	112,453,672	42,981,974	0	2,277,376
3	Dec 5, 2023 07:45	74,110	70,134,915	41,985,000	999,000	2,338,816
4	Dec 5, 2023 07:45	74,148	72,290,960	41,006,000	2,000,000	2,338,816
5	Dec 5, 2023 07:45	74,182	103,802,654	43,025,788	0	2,281,472
6	Dec 5, 2023 08:56	74,222	67,153,398	41,047,000	2,002,000	2,338,816
7	Dec 5, 2023 07:43	74,233	67,334,090	41,053,000	2,002,000	2,289,664
8	Dec 5, 2023 07:43	74,234	73,430,324	42,055,000	1,001,000	2,289,664
9	Dec 5, 2023 07:43	74,238	67,924,811	41,056,000	2,002,000	2,289,664
10	Dec 5, 2023 08:56	74,290	68,091,522	42,086,000	1,002,000	2,289,664
11	Dec 5, 2023 07:47	74,338	66,048,391	41,111,000	2,005,000	2,334,720
12	Dec 5, 2023 08:56	74,429	68,560,663	41,162,000	2,007,000	2,338,816
13	Dec 5, 2023 07:47	74,445	114,559,198	43,178,025	0	2,269,184
14	Dec 5, 2023 08:56	74,467	71,063,272	41,183,000	2,008,000	2,289,664
15	Dec 5, 2023 08:56	74,534	110,877,343	43,229,529	0	2,285,568
16	Dec 5, 2023 07:43	74,564	114,522,362	43,246,927	0	2,281,472
17	Dec 5, 2023 07:47	74,617	68,246,741	43,278,000	0	2,330,624
18	Dec 5, 2023 07:45	74,814	66,799,000	43,392,000	0	2,338,816
19	Dec 5, 2023 07:43	74,817	69,101,109	43,394,000	0	2,289,664
20	Dec 5, 2023 08:56	74,971	68,316,651	42,472,000	1,011,000	2,289,664
21	Dec 5, 2023 08:56	75,018	132,443,292	43,510,324	0	2,285,568
22	Dec 5, 2023 07:47	75,049	113,047,003	43,528,648	0	2,289,664
23	Dec 5, 2023 07:47	75,262	71,115,555	43,652,000	0	2,289,664
24	Dec 5, 2023 07:45	75,333	75,671,408	43,693,000	0	2,330,624
25	Dec 5, 2023 07:47	75,384	72,520,785	43,723,000	0	2,330,624
26	Dec 5, 2023 07:45	75,443	68,070,430	42,740,000	1,017,000	2,289,664
27	Dec 5, 2023 08:56	75,672	68,783,184	41,895,000	1,995,000	2,334,720
28	Dec 5, 2023 07:47	75,683	67,612,586	42,899,000	997,000	2,334,720
29	Dec 5, 2023 07:45	75,700	68,405,911	42,909,000	997,000	2,289,664
30	Dec 5, 2023 07:43	75,761	116,092,481	43,941,229	0	2,277,376
31	Dec 5, 2023 07:43	75,814	68,826,025	41,974,000	1,998,000	2,334,720
32	Dec 5, 2023 08:56	75,919	69,430,693	42,032,000	2,001,000	2,289,664
33	Dec 5, 2023 07:47	75,972	71,897,565	43,063,000	1,001,000	2,334,720
34	Dec 5, 2023 07:43	75,993	67,433,902	42,073,000	2,003,000	2,334,720
35	Dec 5, 2023 07:45	76,024	66,549,095	42,090,000	2,004,000	2,289,664
36	Dec 5, 2023 07:45	76,029	67,105,080	42,093,000	2,004,000	2,289,664
37	Dec 5, 2023 07:43	76,042	121,656,194	44,104,520	0	2,285,568
38	Dec 5, 2023 07:47	76,079	66,285,253	42,121,000	2,005,000	2,330,624
39	Dec 5, 2023 07:45	76,336	91,917,292	44,274,729	0	2,289,664
40	Dec 5, 2023 07:45	76,462	65,413,382	42,333,000	2,015,000	2,289,664
41	Dec 5, 2023 08:56	76,610	112,757,419	44,433,953	0	2,285,568
42	Dec 5, 2023 07:45	76,981	114,078,629	44,649,131	0	2,260,992
43	Dec 5, 2023 07:43	77,371	71,270,381	43,878,000	997,000	2,334,720
44	Dec 5, 2023 07:43	77,498	69,635,094	42,952,000	1,997,000	2,289,664
45	Dec 5, 2023 07:47	77,840	69,938,230	44,144,000	1,003,000	2,289,664
46	Dec 5, 2023 07:47	78,031	70,704,979	44,253,000	1,005,000	2,289,664
47	Dec 5, 2023 08:56	79,459	68,834,457	44,083,000	2,003,000	2,334,720
48	Dec 5, 2023 08:56	80,986	73,972,814	45,973,000	999,000	2,289,664

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