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	Oct 17, 2024 11:45	0	0	0	0	0	Error: expected "2209951 ", got "2207677 "
2	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "588908 ", got "587042 "
3	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "1491256 ", got "2009402 "
4	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "921873 ", got "946561 "
5	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "972185 ", got "1080940 "
6	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "1798475 ", got "2333978 "
7	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "844980 ", got "847401 "
8	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "1748871 ", got "1812198 "
9	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "963464 ", got "999011 "
10	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "1432570 ", got "1622849 "
11	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "747875 ", got "747942 "
12	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "1422707 ", got "1423037 "
13	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "1502169 ", got "1602080 "
14	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "1501285 ", got "1498223 "
15	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "2761877 ", got "2762192 "
16	Oct 17, 2024 11:46	0	0	0	0	0	Error: expected "883796 ", got "1145565 "
17	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1744873 ", got "1766569 "
18	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1408594 ", got "1438647 "
19	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "751335 ", got "752624 "
20	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1258584 ", got "1260262 "
21	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1050431 ", got "5690651 "
22	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "650841 ", got "660069 "
23	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "2266407 ", got "2397443 "
24	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1798212 ", got "1797943 "
25	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1800315 ", got "1869691 "
26	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "781556 ", got "799923 "
27	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "822956 ", got "862349 "
28	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1255805 ", got "1317337 "
29	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "727020 ", got "796155 "
30	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "771754 ", got "861724 "
31	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "788646 ", got "803957 "
32	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "2102483 ", got "2134423 "
33	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1803407 ", got "1803787 "
34	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "3640573 ", got "3636127 "
35	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "2113357 ", got "2175135 "
36	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1489025 ", got "1490483 "
37	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1423326 ", got "1423634 "
38	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "2694243 ", got "3041745 "
39	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "681616 ", got "683352 "
40	Oct 17, 2024 11:47	0	0	0	0	0	Error: expected "1087149 ", got "1088139 "
41	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "2612473 ", got "3016414 "
42	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1455956 ", got "1507306 "
43	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "702653 ", got "923988 "
44	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "2130640 ", got "2136810 "
45	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1022065 ", got "1082666 "
46	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1328592 ", got "3916502 "
47	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1241791 ", got "1726189 "
48	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "624806 ", got "739278 "
49	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1525329 ", got "1951322 "
50	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "748228 ", got "749559 "
51	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1002122 ", got "1090370 "
52	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "3261313 ", got "3265455 "
53	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1192358 ", got "1288519 "
54	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1784933 ", got "1790786 "
55	Oct 17, 2024 11:48	0	0	0	0	0	Error: No answer to stdout. Died or killed?
56	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "922165 ", got "938572 "
57	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "821253 ", got "1079421 "
58	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "809596 ", got "845990 "
59	Oct 17, 2024 11:48	0	0	0	0	0	Error: No answer to stdout. Died or killed?
60	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1891616 ", got "1894406 "
61	Oct 17, 2024 11:48	0	0	0	0	0	Error: expected "1590864 ", got "1687214 "
62	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "1533110 ", got "1592701 "
63	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "2228851 ", got "2245365 "
64	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "993062 ", got "992111 "
65	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "781191 ", got "814361 "
66	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "1228220 ", got "1230172 "
67	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "2103373 ", got "2170535 "
68	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "931634 ", got "1126649 "
69	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "2361764 ", got "2441116 "
70	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "2714005 ", got "2714955 "
71	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "1252043 ", got "1266301 "
72	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "1932575 ", got "1939160 "
73	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "2421508 ", got "2693561 "
74	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "829687 ", got "829631 "
75	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "1072847 ", got "1101510 "
76	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "1308056 ", got "1307912 "
77	Oct 17, 2024 11:49	0	0	0	0	0	Error: No answer to stdout. Died or killed?
78	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "2054340 ", got "2103389 "
79	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "974246 ", got "1072487 "
80	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "2253068 ", got "2297025 "
81	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "1757469 ", got "1757772 "
82	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "1416166 ", got "1438206 "
83	Oct 17, 2024 11:49	0	0	0	0	0	Error: expected "866694 ", got "1400252 "
84	Oct 17, 2024 11:50	0	0	0	0	0	Error: expected "1344496 ", got "1415631 "
85	Oct 17, 2024 12:34	0	0	0	0	0	Error: expected "2709546 ", got "2725182 "
86	Oct 17, 2024 12:34	0	0	0	0	0	Error: expected "1976751 ", got "1984145 "
87	Oct 17, 2024 12:34	0	0	0	0	0	Error: expected "1427917 ", got "1432296 "
88	Oct 17, 2024 11:47	40,095	49,511,537	21,233,000	2,022,000	2,514,944
89	Oct 17, 2024 12:34	40,205	45,099,180	20,278,000	3,041,000	2,502,656
90	Oct 17, 2024 11:49	40,295	48,741,437	20,323,000	3,048,000	2,465,792
91	Oct 17, 2024 11:47	40,298	47,585,445	21,341,000	2,032,000	2,412,544
92	Oct 17, 2024 11:48	40,497	50,634,831	19,403,000	4,085,000	2,289,664
93	Oct 17, 2024 12:34	40,584	54,592,622	22,516,000	1,023,000	2,523,136
94	Oct 17, 2024 11:49	40,595	50,728,100	20,474,000	3,071,000	2,465,792
95	Oct 17, 2024 11:49	40,624	50,558,141	20,489,000	3,073,000	2,314,240
96	Oct 17, 2024 11:47	40,636	49,490,184	21,520,000	2,049,000	2,469,888
97	Oct 17, 2024 11:47	40,650	49,086,012	22,552,000	1,025,000	2,424,832
98	Oct 17, 2024 11:47	40,660	44,487,895	22,558,000	1,025,000	2,469,888
99	Oct 17, 2024 12:34	40,676	52,439,182	21,541,000	2,051,000	2,510,848
100	Oct 17, 2024 11:47	40,752	53,274,046	20,553,000	3,083,000	2,461,696
101	Oct 17, 2024 11:47	40,788	55,006,048	21,600,000	2,057,000	2,469,888
102	Oct 17, 2024 11:49	40,807	49,940,968	19,552,000	4,116,000	2,424,832
103	Oct 17, 2024 11:48	40,928	47,863,606	19,610,000	4,128,000	2,273,280
104	Oct 17, 2024 11:49	40,950	50,394,407	21,686,000	2,065,000	2,465,792
105	Oct 17, 2024 11:49	41,124	47,832,824	21,865,000	1,987,000	2,465,792
106	Oct 17, 2024 12:34	41,159	52,122,514	21,883,000	1,989,000	2,392,064
107	Oct 17, 2024 11:48	41,167	48,330,605	21,888,000	1,989,000	2,461,696
108	Oct 17, 2024 11:48	41,178	54,001,969	21,893,000	1,990,000	2,416,640
109	Oct 17, 2024 11:49	41,178	48,865,046	21,893,000	1,990,000	2,379,776
110	Oct 17, 2024 11:47	41,200	52,028,396	18,918,000	4,978,000	2,514,944
111	Oct 17, 2024 11:47	41,209	57,059,397	22,906,000	995,000	2,347,008
112	Oct 17, 2024 11:48	41,226	49,628,620	22,915,000	996,000	2,486,272
113	Oct 17, 2024 11:48	41,241	53,700,598	19,934,000	3,986,000	2,420,736
114	Oct 17, 2024 11:48	41,243	53,787,905	21,928,000	1,993,000	2,428,928
115	Oct 17, 2024 11:47	41,250	48,444,911	19,938,000	3,987,000	2,461,696
116	Oct 17, 2024 11:49	41,264	58,049,813	20,942,000	2,991,000	2,473,984
117	Oct 17, 2024 11:47	41,386	49,778,292	22,004,000	2,000,000	2,469,888
118	Oct 17, 2024 11:48	41,397	51,571,014	22,010,000	2,000,000	2,473,984
119	Oct 17, 2024 12:34	41,417	51,090,417	21,020,000	3,002,000	2,486,272
120	Oct 17, 2024 11:49	41,490	52,014,328	22,059,000	2,005,000	2,310,144
121	Oct 17, 2024 11:48	41,621	53,033,286	22,129,000	2,011,000	2,514,944
122	Oct 17, 2024 11:47	41,747	62,774,889	21,187,000	3,026,000	2,473,984
123	Oct 17, 2024 12:34	46,864	53,644,531	24,161,000	3,020,000	2,473,984

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