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 21:11

E Sequeira

Score: 80,214

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 26, 2024 21:10	75,909	66,226,290	42,026,000	2,001,000	2,293,760
2	Mar 26, 2024 21:11	76,110	77,331,708	42,138,000	2,006,000	2,281,472
3	Mar 26, 2024 21:10	76,490	76,671,319	42,348,000	2,016,000	2,506,752
4	Mar 26, 2024 21:10	76,522	70,828,247	42,366,000	2,017,000	2,510,848
5	Mar 26, 2024 21:12	76,538	66,811,253	43,384,000	1,008,000	2,273,280
6	Mar 26, 2024 21:12	76,555	68,742,196	43,393,000	1,009,000	2,281,472
7	Mar 26, 2024 21:11	76,583	68,025,622	44,418,000	0	2,510,848
8	Mar 26, 2024 21:12	76,986	73,808,608	44,652,000	0	2,506,752
9	Mar 26, 2024 21:11	77,012	74,615,167	44,667,000	0	2,506,752
10	Mar 26, 2024 21:12	79,469	66,672,831	44,088,000	2,004,000	2,285,568
11	Mar 26, 2024 21:12	79,510	69,882,921	44,111,000	2,005,000	2,285,568
12	Mar 26, 2024 21:10	79,529	69,102,219	44,122,000	2,005,000	2,347,008
13	Mar 26, 2024 21:12	79,648	68,982,354	45,192,000	1,004,000	2,285,568
14	Mar 26, 2024 21:11	79,683	70,235,050	44,207,000	2,009,000	2,285,568
15	Mar 26, 2024 21:11	79,683	67,903,955	44,207,000	2,009,000	2,510,848
16	Mar 26, 2024 21:10	79,748	68,632,669	44,243,000	2,011,000	2,506,752
17	Mar 26, 2024 21:11	79,983	70,548,521	45,382,000	1,008,000	2,285,568
18	Mar 26, 2024 21:10	79,998	72,324,243	45,391,000	1,008,000	2,285,568
19	Mar 26, 2024 21:10	80,002	69,103,326	46,401,000	0	2,510,848
20	Mar 26, 2024 21:12	80,005	77,434,177	45,395,000	1,008,000	2,285,568
21	Mar 26, 2024 21:10	80,110	68,620,667	45,454,000	1,010,000	2,285,568
22	Mar 26, 2024 21:12	80,114	72,392,314	45,456,000	1,010,000	2,510,848
23	Mar 26, 2024 21:12	80,214	71,246,369	46,524,000	0	2,269,184
24	Mar 26, 2024 21:10	80,252	69,396,581	45,535,000	1,011,000	2,506,752
25	Mar 26, 2024 21:12	80,288	69,349,689	45,555,000	1,012,000	2,285,568
26	Mar 26, 2024 21:11	80,357	70,224,159	45,594,000	1,013,000	2,285,568
27	Mar 26, 2024 21:11	80,457	71,035,501	45,651,000	1,014,000	2,285,568
28	Mar 26, 2024 21:11	80,572	71,539,898	45,717,000	1,015,000	2,285,568
29	Mar 26, 2024 21:10	80,593	78,374,280	45,728,000	1,016,000	2,506,752
30	Mar 26, 2024 21:12	80,802	73,689,628	45,868,000	997,000	2,510,848
31	Mar 26, 2024 21:10	80,826	72,396,622	45,882,000	997,000	2,273,280
32	Mar 26, 2024 21:11	80,838	72,252,535	44,891,000	1,995,000	2,285,568
33	Mar 26, 2024 21:10	80,964	70,275,495	45,960,000	999,000	2,285,568
34	Mar 26, 2024 21:11	81,059	70,868,565	45,014,000	2,000,000	2,510,848
35	Mar 26, 2024 21:12	81,093	68,481,660	45,033,000	2,001,000	2,347,008
36	Mar 26, 2024 21:11	81,205	71,743,949	45,095,000	2,004,000	2,506,752
37	Mar 26, 2024 21:10	81,429	112,045,184	47,228,921	0	2,224,128
38	Mar 26, 2024 21:12	81,458	122,080,558	47,245,355	0	2,228,224
39	Mar 26, 2024 21:10	81,759	101,657,614	47,419,964	0	2,228,224
40	Mar 26, 2024 21:12	81,955	127,256,374	47,533,908	0	2,232,320
41	Mar 26, 2024 21:11	82,235	111,458,291	47,696,242	0	2,228,224
42	Mar 26, 2024 21:12	82,303	116,112,942	47,735,937	0	2,224,128
43	Mar 26, 2024 21:11	82,531	111,112,501	47,868,223	0	2,232,320
44	Mar 26, 2024 21:10	82,572	103,668,417	47,891,769	0	2,220,032
45	Mar 26, 2024 21:11	82,899	110,201,977	48,081,178	0	2,228,224

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