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 listOct 18, 2024 13:04

matsuoka-601

Score: 38,819

Success

Source Code

Source code access is restricted. Log in to request access.

Challenge History

No challenges yet.

Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Oct 18, 2024 10:06	27,555	36,615,980	13,985,000	1,997,000	2,510,848
2	Oct 18, 2024 13:13	29,436	51,646,140	15,065,000	2,008,000	2,428,928
3	Oct 18, 2024 10:07	30,407	43,220,335	16,599,000	1,037,000	2,273,280
4	Oct 18, 2024 10:06	30,888	39,552,962	15,925,000	1,990,000	2,535,424
5	Oct 18, 2024 10:06	31,171	40,927,795	17,075,000	1,004,000	2,424,832
6	Oct 18, 2024 10:07	31,636	45,095,123	17,330,000	1,019,000	2,420,736
7	Oct 18, 2024 08:28	31,810	37,419,251	17,425,000	1,025,000	2,273,280
8	Oct 18, 2024 08:33	33,843	42,396,004	18,596,000	1,033,000	2,420,736
9	Oct 18, 2024 10:06	35,143	41,066,388	19,364,000	1,019,000	2,424,832
10	Oct 18, 2024 08:29	35,233	55,355,171	19,414,000	1,021,000	2,428,928
11	Oct 18, 2024 08:33	35,390	42,510,698	19,500,000	1,026,000	2,424,832
12	Oct 18, 2024 08:28	35,450	41,172,510	19,533,000	1,028,000	2,510,848
13	Oct 18, 2024 08:28	35,610	49,785,116	19,622,000	1,032,000	2,428,928
14	Oct 18, 2024 08:29	36,086	48,532,251	18,937,000	1,993,000	2,273,280
15	Oct 18, 2024 10:05	36,521	45,168,145	20,174,000	1,008,000	2,428,928
16	Oct 18, 2024 10:06	36,960	51,774,132	20,417,000	1,020,000	2,428,928
17	Oct 18, 2024 10:05	36,960	50,803,111	20,417,000	1,020,000	2,273,280
18	Oct 18, 2024 13:05	37,066	43,706,377	20,475,000	1,023,000	2,428,928
19	Oct 18, 2024 13:04	37,116	39,119,722	21,527,000	0	2,510,848
20	Oct 18, 2024 10:06	37,197	46,956,842	21,574,000	0	2,535,424
21	Oct 18, 2024 08:33	37,431	46,855,356	21,710,000	0	2,424,832
22	Oct 18, 2024 13:04	37,474	50,035,243	20,700,000	1,035,000	2,428,928
23	Oct 18, 2024 13:04	37,781	53,938,024	20,917,000	996,000	2,420,736
24	Oct 18, 2024 10:07	37,947	45,989,466	20,009,000	2,000,000	2,424,832
25	Oct 18, 2024 08:29	37,969	50,855,460	21,021,000	1,001,000	2,424,832
26	Oct 18, 2024 13:04	38,078	44,763,337	20,078,000	2,007,000	2,433,024
27	Oct 18, 2024 10:05	38,088	36,344,626	20,083,000	2,008,000	2,433,024
28	Oct 18, 2024 08:29	38,412	44,255,508	21,267,000	1,012,000	2,420,736
29	Oct 18, 2024 13:05	38,648	46,306,888	22,416,000	0	2,428,928
30	Oct 18, 2024 13:13	38,797	46,984,872	22,502,000	0	2,437,120
31	Oct 18, 2024 13:05	38,819	42,435,739	22,515,000	0	2,510,848
32	Oct 18, 2024 08:29	39,498	41,866,554	20,917,000	1,992,000	2,428,928
33	Oct 18, 2024 08:29	893,597	537,193,880	516,285,000	2,001,000	2,379,776
34	Oct 18, 2024 10:06	895,962	544,456,089	516,660,000	2,998,000	2,379,776
35	Oct 18, 2024 13:04	897,614	546,894,756	518,618,000	1,998,000	2,375,680
36	Oct 18, 2024 10:07	898,498	541,798,151	519,129,000	2,000,000	2,375,680
37	Oct 18, 2024 10:05	898,797	545,656,905	518,301,000	3,001,000	2,326,528
38	Oct 18, 2024 08:28	899,416	550,915,761	518,663,000	2,998,000	2,375,680
39	Oct 18, 2024 10:07	899,890	541,108,856	516,937,000	4,999,000	2,486,272
40	Oct 18, 2024 08:33	900,214	542,478,279	522,124,000	0	2,486,272
41	Oct 18, 2024 10:06	900,531	551,552,479	519,307,000	3,001,000	2,375,680
42	Oct 18, 2024 10:05	901,141	545,261,508	520,664,000	1,998,000	2,486,272
43	Oct 18, 2024 08:33	906,681	548,071,327	523,876,000	1,999,000	2,531,328
44	Oct 18, 2024 08:33	907,910	552,340,104	524,590,000	1,998,000	2,486,272
45	Oct 18, 2024 10:06	908,133	551,331,994	521,720,000	4,997,000	2,387,968
46	Oct 18, 2024 10:06	908,795	548,982,322	525,101,000	2,000,000	2,486,272
47	Oct 18, 2024 08:29	908,845	547,968,484	525,130,000	2,000,000	2,486,272
48	Oct 18, 2024 10:07	909,086	553,821,190	524,269,000	3,001,000	2,486,272
49	Oct 18, 2024 10:05	909,126	551,128,672	524,292,000	3,001,000	2,486,272
50	Oct 18, 2024 08:28	909,955	548,381,434	524,776,000	2,998,000	2,379,776
51	Oct 18, 2024 08:29	910,209	548,917,929	525,922,000	1,999,000	2,383,872
52	Oct 18, 2024 13:04	912,738	566,029,660	527,387,000	2,001,000	2,379,776
53	Oct 18, 2024 10:06	913,250	555,686,807	527,687,000	1,998,000	2,486,272
54	Oct 18, 2024 13:04	914,021	550,023,074	529,132,000	1,000,000	2,383,872
55	Oct 18, 2024 08:28	915,126	555,248,266	528,774,000	1,999,000	2,486,272
56	Oct 18, 2024 10:06	917,071	555,948,485	530,902,000	999,000	2,486,272
57	Oct 18, 2024 13:04	1,980,076	1,180,730,096	1,146,445,000	1,999,000	2,367,488
58	Oct 18, 2024 13:04	1,981,188	1,178,225,062	1,147,089,000	2,000,000	2,482,176
59	Oct 18, 2024 08:29	1,981,976	1,176,579,776	1,147,547,000	1,999,000	2,469,888
60	Oct 18, 2024 13:13	1,991,886	1,178,878,698	1,153,296,000	1,998,000	2,535,424

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