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 30, 2025 02:34

Yuriy Lyfenko

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Mar 30, 2025 02:34	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
2	Mar 30, 2025 02:34	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
3	Mar 30, 2025 02:33	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
4	Mar 30, 2025 02:33	0	0	0	0	0	Error: No answer to stdout. Died or killed?	stderr
5	Mar 30, 2025 02:33	0	0	0	0	0	Error: Exit with code 255: init: 7 mks not enough shares	stderr
6	Mar 30, 2025 02:32	0	0	0	0	0	Error: Exit with code 255: init: 8 mks not enough shares	stderr
7	Mar 30, 2025 02:32	0	0	0	0	0	Error: Exit with code 255: init: 7 mks not enough shares	stderr
8	Mar 29, 2025 23:11	0	0	0	0	0	Error: Exit with code 255: init: 7 mks not enough shares	stderr
9	Mar 30, 2025 02:35	132,895	100,645,023	75,077,000	2,002,000	2,486,272
10	Mar 30, 2025 02:35	132,959	100,833,021	76,115,000	1,001,000	2,486,272
11	Mar 30, 2025 02:35	133,091	100,982,537	75,188,000	2,005,000	2,281,472
12	Mar 29, 2025 23:12	133,379	101,732,080	77,360,000	0	2,285,568
13	Mar 29, 2025 23:12	133,445	102,704,220	76,393,000	1,005,000	2,486,272
14	Mar 29, 2025 23:11	133,495	98,350,834	76,422,000	1,005,000	2,486,272
15	Mar 29, 2025 23:12	133,647	101,186,615	75,528,000	1,987,000	2,281,472
16	Mar 30, 2025 02:32	133,650	100,600,131	76,511,000	1,006,000	2,285,568
17	Mar 29, 2025 23:11	133,753	98,946,411	77,577,000	0	2,486,272
18	Mar 30, 2025 02:35	133,848	102,588,435	76,624,000	1,008,000	2,334,720
19	Mar 29, 2025 23:11	133,867	104,176,290	76,635,000	1,008,000	2,490,368
20	Mar 29, 2025 23:12	133,916	111,040,800	76,663,000	1,008,000	2,285,568
21	Mar 30, 2025 02:35	134,190	103,618,493	76,833,000	997,000	2,330,624
22	Mar 30, 2025 02:35	134,203	103,681,598	76,841,000	997,000	2,285,568
23	Mar 29, 2025 23:11	134,205	106,113,039	76,842,000	997,000	2,285,568
24	Mar 30, 2025 02:35	134,219	106,479,970	75,851,000	1,996,000	2,478,080
25	Mar 29, 2025 23:12	134,222	104,285,538	75,853,000	1,996,000	2,285,568
26	Mar 30, 2025 02:35	134,229	109,859,131	76,855,000	998,000	2,482,176
27	Mar 29, 2025 23:12	134,236	108,210,007	75,861,000	1,996,000	2,285,568
28	Mar 29, 2025 23:11	134,240	110,329,294	75,863,000	1,996,000	2,281,472
29	Mar 29, 2025 23:12	134,250	108,074,310	76,867,000	998,000	2,482,176
30	Mar 30, 2025 02:32	134,252	103,339,715	75,870,000	1,996,000	2,285,568
31	Mar 30, 2025 02:35	134,252	113,910,134	75,870,000	1,996,000	2,285,568
32	Mar 29, 2025 23:11	134,283	102,285,401	75,887,000	1,997,000	2,494,464
33	Mar 29, 2025 23:12	134,364	107,873,181	75,933,000	1,998,000	2,482,176
34	Mar 30, 2025 02:35	134,366	100,985,878	75,934,000	1,998,000	2,285,568
35	Mar 30, 2025 02:32	134,369	105,786,450	75,936,000	1,998,000	2,285,568
36	Mar 29, 2025 23:11	134,431	102,149,963	75,971,000	1,999,000	2,285,568
37	Mar 29, 2025 23:11	134,433	99,936,506	75,972,000	1,999,000	2,285,568
38	Mar 30, 2025 02:35	134,636	101,205,003	76,087,000	2,002,000	2,490,368
39	Mar 29, 2025 23:12	134,738	101,128,871	76,145,000	2,003,000	2,285,568
40	Mar 29, 2025 23:11	135,000	104,065,562	76,293,000	2,007,000	2,277,376
41	Mar 30, 2025 02:35	139,540	104,565,792	78,935,000	1,998,000	2,285,568
42	Mar 30, 2025 02:34	204,398	144,080,639	117,547,000	1,004,000	2,285,568
43	Mar 30, 2025 02:34	205,266	146,686,584	118,054,000	1,000,000	2,285,568
44	Mar 30, 2025 02:34	205,459	142,282,712	117,164,000	2,002,000	2,424,832

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