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.

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory	Error
1	Feb 8, 2025 23:17	0	0	0	0	0	Error: expected "2064299 ", got "2141961 "	stderr
2	Feb 8, 2025 23:09	0	0	0	0	0	Error: expected "1227411 ", got "1266485 "	stderr
3	Feb 8, 2025 23:10	0	0	0	0	0	Error: expected "1424112 ", got "1467237 "	stderr
4	Feb 8, 2025 23:10	0	0	0	0	0	Error: expected "2585788 ", got "2640362 "	stderr
5	Feb 8, 2025 23:09	0	0	0	0	0	Error: expected "616328 ", got "998921 "
6	Feb 8, 2025 23:10	0	0	0	0	0	Error: expected "1149839 ", got "1149934 "
7	Feb 8, 2025 23:10	0	0	0	0	0	Error: expected "2490030 ", got "2667060 "	stderr
8	Feb 8, 2025 23:09	0	0	0	0	0	Error: expected "1157824 ", got "1376162 "	stderr
9	Feb 8, 2025 23:10	0	0	0	0	0	Error: expected "1924934 ", got "2306681 "	stderr
10	Feb 8, 2025 23:16	0	0	0	0	0	Error: expected "2989620 ", got "2994411 "	stderr
11	Feb 8, 2025 23:16	0	0	0	0	0	Error: expected "1485126 ", got "1487834 "	stderr
12	Feb 8, 2025 23:16	0	0	0	0	0	Error: expected "839265 ", got "858235 "	stderr
13	Feb 8, 2025 23:16	0	0	0	0	0	Error: expected "2418874 ", got "2433256 "
14	Feb 8, 2025 23:16	0	0	0	0	0	Error: expected "775524 ", got "808116 "	stderr
15	Feb 8, 2025 23:17	0	0	0	0	0	Error: expected "1480034 ", got "1526831 "
16	Feb 8, 2025 23:09	0	0	0	0	0	Error: expected "1123041 ", got "1166132 "	stderr
17	Feb 8, 2025 23:09	0	0	0	0	0	Error: expected "1486707 ", got "1530504 "
18	Feb 8, 2025 23:17	0	0	0	0	0	Error: expected "2482944 ", got "2589179 "	stderr
19	Feb 8, 2025 23:18	0	0	0	0	0	Error: expected "1692124 ", got "2161928 "	stderr
20	Feb 8, 2025 23:18	0	0	0	0	0	Error: expected "1751051 ", got "1833233 "
21	Feb 8, 2025 23:18	0	0	0	0	0	Error: expected "2751475 ", got "2761603 "
22	Feb 8, 2025 23:18	0	0	0	0	0	Error: expected "3364915 ", got "3472027 "
23	Feb 8, 2025 23:18	0	0	0	0	0	Error: expected "1387264 ", got "1438698 "
24	Feb 8, 2025 23:18	0	0	0	0	0	Error: expected "1332921 ", got "1409393 "	stderr
25	Feb 8, 2025 23:09	0	0	0	0	0	Error: expected "3067318 ", got "3067672 "
26	Feb 8, 2025 23:18	71,774	73,100,650	41,629,000	0	2,420,736
27	Feb 8, 2025 23:10	71,838	68,460,572	41,666,000	0	2,420,736
28	Feb 8, 2025 23:10	71,860	69,079,949	40,663,000	1,016,000	2,535,424
29	Feb 8, 2025 23:17	71,929	65,852,882	41,719,000	0	2,527,232
30	Feb 8, 2025 23:16	71,936	67,773,991	41,723,000	0	2,531,328
31	Feb 8, 2025 23:10	71,967	71,967,209	41,741,000	0	2,269,184
32	Feb 8, 2025 23:10	71,969	72,683,591	41,742,000	0	2,269,184
33	Feb 8, 2025 23:16	72,010	69,977,850	40,748,000	1,018,000	2,269,184
34	Feb 8, 2025 23:10	72,176	70,051,571	39,869,000	1,993,000	2,424,832
35	Feb 8, 2025 23:17	72,184	65,824,077	40,871,000	996,000	2,535,424
36	Feb 8, 2025 23:10	72,212	67,770,647	40,886,000	997,000	2,531,328
37	Feb 8, 2025 23:16	72,212	71,533,534	40,886,000	997,000	2,420,736
38	Feb 8, 2025 23:17	72,212	67,526,152	40,886,000	997,000	2,531,328
39	Feb 8, 2025 23:16	72,217	69,257,800	39,892,000	1,994,000	2,527,232
40	Feb 8, 2025 23:16	72,222	66,657,979	40,892,000	997,000	2,531,328
41	Feb 8, 2025 23:17	72,222	73,126,731	39,895,000	1,994,000	2,527,232
42	Feb 8, 2025 23:10	72,226	68,037,546	41,891,000	0	2,535,424
43	Feb 8, 2025 23:10	72,226	70,858,198	40,894,000	997,000	2,416,640
44	Feb 8, 2025 23:16	72,234	68,557,008	39,901,000	1,995,000	2,420,736
45	Feb 8, 2025 23:19	72,236	66,950,186	40,900,000	997,000	2,269,184
46	Feb 8, 2025 23:10	72,236	71,624,084	39,902,000	1,995,000	2,269,184
47	Feb 8, 2025 23:17	72,238	68,392,689	40,901,000	997,000	2,420,736
48	Feb 8, 2025 23:18	72,240	70,201,796	39,904,000	1,995,000	2,531,328
49	Feb 8, 2025 23:17	72,260	73,456,631	39,916,000	1,995,000	2,531,328
50	Feb 8, 2025 23:16	72,262	65,204,332	39,917,000	1,995,000	2,420,736
51	Feb 8, 2025 23:10	72,266	65,069,160	39,919,000	1,995,000	2,535,424
52	Feb 8, 2025 23:19	72,271	68,772,157	40,919,000	998,000	2,269,184
53	Feb 8, 2025 23:19	72,281	64,505,182	39,927,000	1,996,000	2,269,184
54	Feb 8, 2025 23:10	72,286	66,657,144	40,928,000	998,000	2,416,640
55	Feb 8, 2025 23:17	72,293	62,348,161	39,934,000	1,996,000	2,412,544
56	Feb 8, 2025 23:17	72,298	67,734,265	39,937,000	1,996,000	2,273,280
57	Feb 8, 2025 23:17	72,305	67,479,516	39,940,000	1,997,000	2,535,424
58	Feb 8, 2025 23:17	72,314	67,945,680	39,945,000	1,997,000	2,424,832
59	Feb 8, 2025 23:10	72,353	68,332,319	40,966,000	999,000	2,527,232
60	Feb 8, 2025 23:16	72,357	67,081,500	39,969,000	1,998,000	2,420,736
61	Feb 8, 2025 23:10	72,381	71,273,973	40,982,000	999,000	2,416,640
62	Feb 8, 2025 23:10	72,388	67,289,109	40,986,000	999,000	2,269,184
63	Feb 8, 2025 23:16	72,479	71,334,120	40,037,000	2,001,000	2,416,640
64	Feb 8, 2025 23:10	72,507	65,859,929	40,052,000	2,002,000	2,535,424
65	Feb 8, 2025 23:18	72,522	63,003,671	40,060,000	2,003,000	2,416,640
66	Feb 8, 2025 23:10	72,638	67,948,438	41,127,000	1,003,000	2,531,328
67	Feb 8, 2025 23:17	72,640	71,738,304	40,125,000	2,006,000	2,420,736
68	Feb 8, 2025 23:10	72,641	65,863,704	41,129,000	1,003,000	2,531,328
69	Feb 8, 2025 23:10	72,705	63,980,539	41,165,000	1,004,000	2,527,232
70	Feb 8, 2025 23:17	72,871	66,758,880	40,253,000	2,012,000	2,428,928

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