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 listFeb 16, 2022 03:40

Istomin Mikhail

Score: 87,047

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Feb 18, 2022 05:41	64,203	66,389,752	35,226,000	2,012,000	2,486,272
2	Feb 16, 2022 03:33	65,029	62,970,635	36,698,000	1,019,000	2,285,568
3	Feb 16, 2022 03:40	67,367	65,021,603	37,070,000	2,003,000	2,285,568
4	Feb 18, 2022 05:41	67,852	63,868,928	37,336,000	2,018,000	2,285,568
5	Feb 16, 2022 03:40	68,371	65,025,910	38,639,000	1,016,000	2,482,176
6	Feb 16, 2022 03:33	69,105	62,405,841	38,077,000	2,004,000	2,469,888
7	Feb 18, 2022 05:41	72,203	67,094,331	39,884,000	1,994,000	2,469,888
8	Feb 16, 2022 03:33	76,129	72,661,154	41,145,000	3,010,000	2,461,696
9	Feb 16, 2022 03:40	77,848	69,893,777	41,139,000	4,013,000	2,527,232
10	Feb 16, 2022 03:40	77,960	67,834,545	42,203,000	3,014,000	2,473,984
11	Feb 16, 2022 03:40	82,821	68,700,627	44,033,000	4,003,000	2,281,472
12	Feb 16, 2022 03:40	82,988	73,786,501	46,128,000	2,005,000	2,478,080
13	Feb 18, 2022 05:41	84,266	76,558,980	44,885,000	3,989,000	2,465,792
14	Feb 16, 2022 03:33	84,269	75,138,956	45,884,000	2,992,000	2,461,696
15	Feb 18, 2022 05:41	84,947	110,241,332	49,269,092	0	2,179,072
16	Feb 16, 2022 03:33	85,715	112,656,506	49,714,604	0	2,191,360
17	Feb 16, 2022 03:33	85,835	108,898,802	49,784,505	0	2,301,952
18	Feb 16, 2022 03:33	85,952	81,976,729	47,858,000	1,994,000	2,306,048
19	Feb 18, 2022 05:41	85,984	72,660,465	46,879,000	2,992,000	2,461,696
20	Feb 18, 2022 05:41	86,112	117,861,568	49,945,147	0	2,183,168
21	Feb 18, 2022 05:41	86,662	73,835,511	48,254,000	2,010,000	2,506,752
22	Feb 18, 2022 05:41	87,047	73,257,015	46,448,000	4,039,000	2,453,504
23	Feb 16, 2022 03:33	87,364	81,031,589	47,631,000	3,040,000	2,289,664
24	Feb 16, 2022 03:33	87,703	76,040,124	46,879,000	3,989,000	2,449,408
25	Feb 16, 2022 03:33	87,888	78,198,563	46,977,000	3,998,000	2,285,568
26	Feb 18, 2022 05:41	88,338	74,036,866	47,218,000	4,018,000	2,289,664
27	Feb 16, 2022 03:33	88,631	80,099,863	48,383,000	3,023,000	2,482,176
28	Feb 16, 2022 03:33	89,319	77,942,969	48,817,000	2,988,000	2,314,240
29	Feb 18, 2022 05:41	89,778	121,343,751	52,071,215	0	2,179,072
30	Feb 18, 2022 05:41	90,216	74,333,231	48,300,000	4,025,000	2,453,504
31	Feb 16, 2022 03:40	90,951	115,384,511	52,751,303	0	2,183,168
32	Feb 16, 2022 03:40	94,990	115,955,284	55,094,438	0	2,179,072
33	Feb 16, 2022 03:33	96,231	84,102,152	52,824,000	2,990,000	2,265,088
34	Feb 18, 2022 05:41	99,860	79,604,430	53,925,000	3,994,000	2,445,312
35	Feb 18, 2022 05:41	102,831	91,435,196	56,610,000	3,032,000	2,334,720
36	Feb 18, 2022 05:41	105,028	86,490,328	56,922,000	3,994,000	2,433,024
37	Feb 16, 2022 03:40	107,081	118,699,872	62,107,110	0	2,195,456
38	Feb 16, 2022 03:40	111,556	128,241,702	64,702,718	0	2,232,320
39	Feb 16, 2022 03:33	113,987	134,520,327	66,112,700	0	2,301,952
40	Feb 16, 2022 03:40	118,651	133,209,784	68,817,582	0	2,306,048
41	Feb 16, 2022 03:40	118,920	140,853,072	68,973,728	0	2,240,512
42	Feb 16, 2022 03:33	121,512	94,195,952	68,464,000	2,013,000	2,437,120

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