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 16:53

E Sequeira

Score: 82,816

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Mar 26, 2024 16:53	82,157	73,791,077	46,638,000	1,013,000	2,510,848
2	Mar 26, 2024 17:05	82,162	116,732,952	47,654,178	0	2,211,840
3	Mar 26, 2024 16:53	82,229	77,196,423	47,693,000	0	2,285,568
4	Mar 26, 2024 17:12	82,238	73,618,718	46,684,000	1,014,000	2,285,568
5	Mar 26, 2024 16:54	82,292	116,292,600	47,729,356	0	2,215,936
6	Mar 26, 2024 16:53	82,302	102,595,939	47,734,879	0	2,207,744
7	Mar 26, 2024 16:54	82,312	110,497,727	47,740,741	0	2,211,840
8	Mar 26, 2024 16:53	82,336	121,012,196	47,755,048	0	2,211,840
9	Mar 26, 2024 16:53	82,402	109,514,513	47,793,062	0	2,211,840
10	Mar 26, 2024 17:34	82,436	113,361,936	47,812,780	0	2,215,936
11	Mar 26, 2024 16:53	82,510	103,469,934	47,855,575	0	2,215,936
12	Mar 26, 2024 16:57	82,520	106,871,760	47,861,427	0	2,215,936
13	Mar 26, 2024 17:34	82,535	127,064,098	47,870,518	0	2,211,840
14	Mar 26, 2024 17:34	82,541	78,231,481	45,880,000	1,994,000	2,273,280
15	Mar 26, 2024 16:54	82,555	75,927,951	46,885,000	997,000	2,285,568
16	Mar 26, 2024 16:53	82,559	74,235,338	46,887,000	997,000	2,285,568
17	Mar 26, 2024 16:53	82,564	75,723,311	46,890,000	997,000	2,285,568
18	Mar 26, 2024 16:54	82,564	74,219,152	45,892,000	1,995,000	2,519,040
19	Mar 26, 2024 16:53	82,569	77,929,141	45,895,000	1,995,000	2,273,280
20	Mar 26, 2024 17:34	82,576	74,755,690	45,899,000	1,995,000	2,519,040
21	Mar 26, 2024 17:34	82,586	72,972,656	45,905,000	1,995,000	2,285,568
22	Mar 26, 2024 16:57	82,586	79,652,045	45,905,000	1,995,000	2,273,280
23	Mar 26, 2024 16:54	82,590	73,481,323	46,883,000	1,019,000	2,510,848
24	Mar 26, 2024 17:34	82,595	75,384,588	45,909,000	1,996,000	2,285,568
25	Mar 26, 2024 17:34	82,609	74,403,940	45,917,000	1,996,000	2,285,568
26	Mar 26, 2024 17:05	82,641	78,864,481	46,934,000	998,000	2,285,568
27	Mar 26, 2024 17:34	82,660	70,679,772	45,946,000	1,997,000	2,510,848
28	Mar 26, 2024 16:57	82,667	76,459,409	45,950,000	1,997,000	2,285,568
29	Mar 26, 2024 17:12	82,678	71,852,211	46,954,000	999,000	2,285,568
30	Mar 26, 2024 16:53	82,691	71,049,733	45,963,000	1,998,000	2,285,568
31	Mar 26, 2024 16:53	82,698	71,759,464	45,967,000	1,998,000	2,285,568
32	Mar 26, 2024 16:53	82,704	109,132,700	47,968,317	0	2,215,936
33	Mar 26, 2024 17:05	82,714	76,712,990	45,976,000	1,998,000	2,285,568
34	Mar 26, 2024 16:53	82,722	77,072,597	45,980,000	1,999,000	2,285,568
35	Mar 26, 2024 17:05	82,722	71,274,891	45,980,000	1,999,000	2,285,568
36	Mar 26, 2024 17:34	82,726	70,558,372	46,982,000	999,000	2,285,568
37	Mar 26, 2024 17:05	82,731	71,178,247	45,985,000	1,999,000	2,285,568
38	Mar 26, 2024 17:12	82,760	71,774,104	46,001,000	2,000,000	2,502,656
39	Mar 26, 2024 17:12	82,771	72,438,379	46,007,000	2,000,000	2,506,752
40	Mar 26, 2024 16:57	82,774	80,052,014	46,009,000	2,000,000	2,285,568
41	Mar 26, 2024 17:34	82,800	70,447,811	46,023,000	2,001,000	2,285,568
42	Mar 26, 2024 16:53	82,802	67,658,304	47,025,000	1,000,000	2,510,848
43	Mar 26, 2024 16:54	82,816	71,320,528	47,033,000	1,000,000	2,285,568
44	Mar 26, 2024 17:12	82,876	70,616,904	46,066,000	2,002,000	2,519,040
45	Mar 26, 2024 17:05	82,900	71,733,453	46,079,000	2,003,000	2,510,848
46	Mar 26, 2024 17:34	82,910	121,528,585	48,087,642	0	2,211,840
47	Mar 26, 2024 16:57	82,921	74,899,908	46,091,000	2,003,000	2,285,568
48	Mar 26, 2024 17:05	82,931	76,446,885	47,098,000	1,002,000	2,506,752
49	Mar 26, 2024 16:53	82,934	70,351,965	46,098,000	2,004,000	2,285,568
50	Mar 26, 2024 16:54	82,934	70,747,828	46,098,000	2,004,000	2,285,568
51	Mar 26, 2024 16:53	82,934	71,882,494	46,098,000	2,004,000	2,285,568
52	Mar 26, 2024 16:53	82,940	83,456,895	48,105,000	0	2,506,752
53	Mar 26, 2024 16:54	82,943	71,188,342	46,103,000	2,004,000	2,260,992
54	Mar 26, 2024 16:57	82,947	74,451,761	46,105,000	2,004,000	2,342,912
55	Mar 26, 2024 17:05	82,948	72,941,020	46,106,000	2,004,000	2,285,568
56	Mar 26, 2024 17:34	82,955	69,838,082	46,110,000	2,004,000	2,285,568
57	Mar 26, 2024 17:12	82,988	73,194,015	47,131,000	1,002,000	2,285,568
58	Mar 26, 2024 16:53	83,000	74,647,875	46,135,000	2,005,000	2,285,568
59	Mar 26, 2024 17:12	83,032	125,120,352	48,158,436	0	2,211,840
60	Mar 26, 2024 17:05	83,069	122,587,761	48,180,154	0	2,220,032
61	Mar 26, 2024 17:12	83,084	113,257,674	48,188,774	0	2,220,032
62	Mar 26, 2024 16:53	83,094	109,836,141	48,194,744	0	2,211,840
63	Mar 26, 2024 16:53	83,114	71,396,424	46,198,000	2,008,000	2,285,568
64	Mar 26, 2024 17:12	83,133	70,646,978	47,213,000	1,004,000	2,371,584
65	Mar 26, 2024 17:05	83,148	102,835,929	48,225,756	0	2,228,224
66	Mar 26, 2024 16:57	83,165	119,793,297	48,235,535	0	2,215,936
67	Mar 26, 2024 16:57	83,172	70,185,600	46,230,000	2,010,000	2,347,008
68	Mar 26, 2024 16:53	83,198	71,572,478	47,250,000	1,005,000	2,265,088
69	Mar 26, 2024 16:57	83,222	76,798,003	46,258,000	2,011,000	2,506,752
70	Mar 26, 2024 16:54	83,298	70,499,982	47,307,000	1,006,000	2,273,280
71	Mar 26, 2024 17:12	83,357	69,635,385	46,333,000	2,014,000	2,285,568
72	Mar 26, 2024 16:53	83,433	74,387,010	47,383,000	1,008,000	2,519,040
73	Mar 26, 2024 17:05	83,443	77,902,109	46,381,000	2,016,000	2,510,848
74	Mar 26, 2024 16:57	83,455	73,893,079	47,396,000	1,008,000	2,510,848
75	Mar 26, 2024 16:53	83,488	72,034,468	47,415,000	1,008,000	2,506,752
76	Mar 26, 2024 16:54	83,626	70,776,539	47,493,000	1,010,000	2,510,848
77	Mar 26, 2024 16:54	83,645	70,946,294	47,504,000	1,010,000	2,285,568
78	Mar 26, 2024 16:53	83,714	72,627,859	47,543,000	1,011,000	2,510,848
79	Mar 26, 2024 16:54	83,740	104,592,959	48,569,178	0	2,211,840
80	Mar 26, 2024 16:57	83,783	73,901,973	47,582,000	1,012,000	2,367,488
81	Mar 26, 2024 16:57	83,802	135,509,602	48,605,300	0	2,215,936
82	Mar 26, 2024 17:05	84,009	78,452,382	47,710,000	1,015,000	2,506,752
83	Mar 26, 2024 17:12	84,026	74,463,600	47,720,000	1,015,000	2,285,568
84	Mar 26, 2024 17:12	84,130	104,828,712	48,795,231	0	2,211,840

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