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	Dec 27, 2024 02:53	0	0	0	0	0	Error: expected "1305123 ", got "1077000 "	stderr
2	Dec 27, 2024 02:54	0	0	0	0	0	Error: expected "842890 ", got "807961 "	stderr
3	Dec 27, 2024 02:54	0	0	0	0	0	Error: expected "3608366 ", got "3600591 "	stderr
4	Dec 27, 2024 02:54	0	0	0	0	0	Error: expected "1157242 ", got "1136173 "	stderr
5	Dec 27, 2024 02:54	0	0	0	0	0	Error: expected "2456994 ", got "2456910 "	stderr
6	Dec 27, 2024 02:54	0	0	0	0	0	Error: expected "1830780 ", got "1789000 "	stderr
7	Dec 27, 2024 02:53	0	0	0	0	0	Error: expected "807247 ", got "791714 "	stderr
8	Dec 27, 2024 02:53	0	0	0	0	0	Error: expected "849295 ", got "809790 "	stderr
9	Dec 27, 2024 02:53	0	0	0	0	0	Error: expected "1728712 ", got "1680664 "	stderr
10	Dec 27, 2024 02:53	0	0	0	0	0	Error: expected "1950289 ", got "1566000 "	stderr
11	Dec 27, 2024 02:54	0	0	0	0	0	Error: expected "1346564 ", got "1236900 "	stderr
12	Dec 27, 2024 02:53	0	0	0	0	0	Error: expected "1968264 ", got "1904490 "	stderr
13	Dec 27, 2024 02:52	0	0	0	0	0	Error: expected "2635212 ", got "2609709 "	stderr
14	Dec 27, 2024 02:52	0	0	0	0	0	Error: expected "1530794 ", got "1418646 "	stderr
15	Dec 27, 2024 02:52	0	0	0	0	0	Error: expected "748305 ", got "721454 "	stderr
16	Dec 27, 2024 02:52	0	0	0	0	0	Error: expected "2729855 ", got "2684165 "	stderr
17	Dec 27, 2024 02:52	0	0	0	0	0	Error: expected "1558904 ", got "1550185 "	stderr
18	Dec 27, 2024 02:52	0	0	0	0	0	Error: expected "1872201 ", got "1722734 "	stderr
19	Dec 27, 2024 02:52	0	0	0	0	0	Error: expected "715308 ", got "692593 "	stderr
20	Dec 27, 2024 02:51	0	0	0	0	0	Error: expected "778732 ", got "774839 "	stderr
21	Dec 27, 2024 02:56	0	0	0	0	0	Error: expected "2196612 ", got "2051000 "	stderr
22	Dec 27, 2024 02:57	0	0	0	0	0	Error: expected "2101144 ", got "2097166 "	stderr
23	Dec 27, 2024 02:57	0	0	0	0	0	Error: expected "954241 ", got "947523 "	stderr
24	Dec 27, 2024 02:57	0	0	0	0	0	Error: expected "1716921 ", got "1665551 "	stderr
25	Dec 27, 2024 02:57	0	0	0	0	0	Error: expected "2622411 ", got "2559718 "	stderr
26	Dec 27, 2024 02:57	0	0	0	0	0	Error: expected "1467283 ", got "1439000 "	stderr
27	Dec 27, 2024 02:56	0	0	0	0	0	Error: expected "972859 ", got "912184 "	stderr
28	Dec 27, 2024 02:56	0	0	0	0	0	Error: expected "2056576 ", got "1908000 "	stderr
29	Dec 27, 2024 02:56	0	0	0	0	0	Error: expected "1337322 ", got "1274000 "	stderr
30	Dec 27, 2024 02:56	0	0	0	0	0	Error: expected "1172199 ", got "1083681 "	stderr
31	Dec 27, 2024 02:49	0	0	0	0	0	Error: expected "1872164 ", got "1696646 "	stderr
32	Dec 27, 2024 02:56	0	0	0	0	0	Error: expected "1944353 ", got "1923331 "	stderr
33	Dec 27, 2024 02:56	0	0	0	0	0	Error: expected "1188319 ", got "1187829 "	stderr
34	Dec 27, 2024 02:55	0	0	0	0	0	Error: expected "1661300 ", got "1646890 "	stderr
35	Dec 27, 2024 02:55	0	0	0	0	0	Error: expected "1663723 ", got "1580883 "	stderr
36	Dec 27, 2024 02:55	0	0	0	0	0	Error: expected "2971145 ", got "2943374 "	stderr
37	Dec 27, 2024 02:55	0	0	0	0	0	Error: expected "1146052 ", got "1072494 "	stderr
38	Dec 27, 2024 02:55	0	0	0	0	0	Error: expected "2072192 ", got "2063409 "	stderr
39	Dec 27, 2024 02:54	0	0	0	0	0	Error: expected "3207699 ", got "3154000 "	stderr
40	Dec 27, 2024 02:57	21,622	31,668,529	12,541,000	0	2,338,816
41	Dec 27, 2024 02:56	22,831	31,181,284	12,224,000	1,018,000	2,510,848
42	Dec 27, 2024 02:52	24,269	38,450,520	14,076,000	0	2,363,392
43	Dec 27, 2024 02:56	24,748	30,468,762	13,329,000	1,025,000	2,342,912
44	Dec 27, 2024 02:54	25,321	35,516,032	12,588,000	2,098,000	2,404,352
45	Dec 27, 2024 02:55	25,714	36,234,149	13,920,000	994,000	2,457,600
46	Dec 27, 2024 02:53	26,736	40,335,589	15,507,000	0	2,342,912
47	Dec 27, 2024 02:57	26,760	33,200,904	15,521,000	0	2,306,048
48	Dec 27, 2024 02:57	27,145	36,715,896	15,744,000	0	2,461,696
49	Dec 27, 2024 02:55	28,291	43,623,731	16,409,000	0	2,371,584
50	Dec 27, 2024 02:52	30,160	39,887,650	17,493,000	0	2,342,912
51	Dec 27, 2024 02:56	30,209	41,998,727	16,491,000	1,030,000	2,506,752
52	Dec 27, 2024 02:51	30,245	49,090,129	16,511,000	1,031,000	2,355,200
53	Dec 27, 2024 02:57	31,822	39,599,751	18,457,000	0	2,428,928
54	Dec 27, 2024 02:55	31,883	50,343,394	18,492,000	0	2,330,624
55	Dec 27, 2024 02:51	33,010	49,362,619	18,139,000	1,007,000	2,330,624
56	Dec 27, 2024 02:54	33,502	42,041,670	19,431,000	0	2,359,296
57	Dec 27, 2024 02:52	34,598	44,126,282	20,067,000	0	2,359,296
58	Dec 27, 2024 02:55	34,647	49,725,401	20,095,000	0	2,322,432
59	Dec 27, 2024 02:53	35,136	49,140,053	20,379,000	0	2,428,928
60	Dec 27, 2024 02:55	35,234	38,497,002	20,436,000	0	2,342,912
61	Dec 27, 2024 02:52	35,552	42,148,516	20,620,000	0	2,338,816
62	Dec 27, 2024 02:57	35,712	46,096,184	20,713,000	0	2,310,144
63	Dec 27, 2024 02:51	35,772	52,275,236	20,748,000	0	2,355,200
64	Dec 27, 2024 02:52	36,197	45,852,221	19,995,000	999,000	2,387,968
65	Dec 27, 2024 02:55	36,248	43,463,824	19,022,000	2,002,000	2,359,296
66	Dec 27, 2024 02:53	36,317	46,792,390	21,064,000	0	2,375,680
67	Dec 27, 2024 02:57	36,417	47,663,435	19,111,000	2,011,000	2,408,448
68	Dec 27, 2024 02:55	36,740	47,018,206	21,309,000	0	2,400,256
69	Dec 27, 2024 02:57	36,967	43,048,946	21,441,000	0	2,437,120
70	Dec 27, 2024 02:53	36,991	39,893,254	20,434,000	1,021,000	2,482,176
71	Dec 27, 2024 02:57	37,053	40,193,402	20,468,000	1,023,000	2,379,776
72	Dec 27, 2024 02:52	37,200	45,823,232	21,576,000	0	2,445,312
73	Dec 27, 2024 02:57	37,248	41,578,340	21,604,000	0	2,486,272
74	Dec 27, 2024 02:55	37,267	41,126,467	21,615,000	0	2,465,792
75	Dec 27, 2024 02:53	37,290	48,409,750	20,599,000	1,029,000	2,359,296
76	Dec 27, 2024 02:53	37,516	46,040,349	21,759,000	0	2,392,064
77	Dec 27, 2024 02:54	37,759	43,628,163	21,900,000	0	2,441,216
78	Dec 27, 2024 02:55	37,843	47,839,311	19,954,000	1,995,000	2,445,312

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