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 listDec 22, 2025 02:30

Josu San MartinScore: 36,838Success

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 22, 2025 03:35	34,390	45,371,797	18,949,000	997,000	2,506,752
2	Dec 22, 2025 02:56	34,507	43,629,866	19,014,000	1,000,000	2,510,848
3	Dec 22, 2025 02:12	34,598	47,014,205	18,061,000	2,006,000	2,482,176
4	Dec 22, 2025 02:35	34,948	45,583,836	20,270,000	0	2,473,984
5	Dec 22, 2025 03:36	35,022	41,768,934	20,313,000	0	2,494,464
6	Dec 22, 2025 02:03	35,131	43,623,574	19,358,000	1,018,000	2,482,176
7	Dec 22, 2025 03:00	35,233	43,898,226	19,414,000	1,021,000	2,482,176
8	Dec 22, 2025 02:57	35,247	43,829,440	19,421,000	1,022,000	2,490,368
9	Dec 22, 2025 02:56	35,328	42,514,620	20,490,000	0	2,473,984
10	Dec 22, 2025 02:29	35,331	45,646,521	19,468,000	1,024,000	2,506,752
11	Dec 22, 2025 02:36	35,350	45,310,421	19,478,000	1,025,000	2,473,984
12	Dec 22, 2025 02:56	35,362	43,778,625	19,485,000	1,025,000	2,490,368
13	Dec 22, 2025 02:05	35,362	44,069,596	19,485,000	1,025,000	2,469,888
14	Dec 22, 2025 02:12	35,391	48,057,007	20,527,000	0	2,465,792
15	Dec 22, 2025 02:29	35,416	37,880,843	19,514,000	1,027,000	2,461,696
16	Dec 22, 2025 03:53	35,417	45,734,282	19,515,000	1,027,000	2,408,448
17	Dec 22, 2025 02:56	35,474	47,883,432	19,547,000	1,028,000	2,461,696
18	Dec 22, 2025 02:05	35,581	47,328,114	19,606,000	1,031,000	2,510,848
19	Dec 22, 2025 02:57	35,624	45,114,187	19,629,000	1,033,000	2,490,368
20	Dec 22, 2025 03:00	35,659	45,570,997	19,648,000	1,034,000	2,408,448
21	Dec 22, 2025 02:36	35,666	50,407,608	19,652,000	1,034,000	2,441,216
22	Dec 22, 2025 02:57	35,747	47,055,904	19,697,000	1,036,000	2,465,792
23	Dec 22, 2025 02:36	35,790	53,701,256	19,721,000	1,037,000	2,347,008
24	Dec 22, 2025 03:54	36,031	49,864,682	19,903,000	995,000	2,383,872
25	Dec 22, 2025 04:13	36,034	45,910,721	18,910,000	1,990,000	2,465,792
26	Dec 22, 2025 03:53	36,040	47,020,258	18,913,000	1,990,000	2,420,736
27	Dec 22, 2025 02:56	36,045	49,502,704	18,915,000	1,991,000	2,412,544
28	Dec 22, 2025 03:35	36,053	49,243,608	20,911,000	0	2,453,504
29	Dec 22, 2025 02:36	36,053	47,767,361	18,920,000	1,991,000	2,392,064
30	Dec 22, 2025 02:12	36,071	43,928,994	18,929,000	1,992,000	2,441,216
31	Dec 22, 2025 02:35	36,145	49,736,443	18,968,000	1,996,000	2,408,448
32	Dec 22, 2025 02:56	36,152	41,732,047	19,970,000	998,000	2,273,280
33	Dec 22, 2025 02:56	36,195	49,113,556	18,994,000	1,999,000	2,412,544
34	Dec 22, 2025 03:54	36,216	46,189,010	19,005,000	2,000,000	2,445,312
35	Dec 22, 2025 02:56	36,345	45,855,318	19,073,000	2,007,000	2,437,120
36	Dec 22, 2025 03:36	36,367	42,303,664	20,089,000	1,004,000	2,449,408
37	Dec 22, 2025 02:56	36,405	40,160,074	20,110,000	1,005,000	2,416,640
38	Dec 22, 2025 03:53	36,410	45,118,597	20,113,000	1,005,000	2,469,888
39	Dec 22, 2025 02:56	36,497	47,764,610	18,144,000	3,024,000	2,334,720
40	Dec 22, 2025 02:30	36,729	42,831,736	21,303,000	0	2,486,272
41	Dec 22, 2025 02:30	36,731	44,013,640	20,290,000	1,014,000	2,400,256
42	Dec 22, 2025 02:36	36,802	42,409,278	20,329,000	1,016,000	2,322,432
43	Dec 22, 2025 03:35	36,838	47,625,822	21,366,000	0	2,449,408
44	Dec 22, 2025 02:03	36,874	53,854,916	21,387,000	0	2,445,312
45	Dec 22, 2025 02:56	36,895	45,167,967	20,380,000	1,019,000	2,441,216
46	Dec 22, 2025 04:13	36,909	45,497,869	21,407,000	0	2,392,064
47	Dec 22, 2025 02:36	36,912	43,681,268	20,390,000	1,019,000	2,420,736
48	Dec 22, 2025 02:56	36,940	43,368,927	20,405,000	1,020,000	2,412,544
49	Dec 22, 2025 02:56	36,945	48,098,743	20,408,000	1,020,000	2,404,352
50	Dec 22, 2025 02:57	36,983	44,273,629	20,429,000	1,021,000	2,334,720
51	Dec 22, 2025 03:54	36,995	44,669,097	21,457,000	0	2,416,640
52	Dec 22, 2025 02:56	37,003	45,880,210	21,462,000	0	2,379,776
53	Dec 22, 2025 03:00	37,010	48,457,870	20,444,000	1,022,000	2,351,104
54	Dec 22, 2025 02:36	37,026	47,310,930	20,453,000	1,022,000	2,506,752
55	Dec 22, 2025 02:33	37,060	56,069,939	20,472,000	1,023,000	2,441,216
56	Dec 22, 2025 02:56	37,072	43,909,005	20,479,000	1,023,000	2,265,088
57	Dec 22, 2025 02:12	37,100	45,075,486	20,494,000	1,024,000	2,318,336
58	Dec 22, 2025 02:57	37,102	42,854,488	20,495,000	1,024,000	2,502,656
59	Dec 22, 2025 02:33	37,124	51,567,923	21,532,000	0	2,342,912
60	Dec 22, 2025 02:05	37,124	47,012,107	20,507,000	1,025,000	2,301,952
61	Dec 22, 2025 04:13	37,207	47,903,331	20,553,000	1,027,000	2,404,352
62	Dec 22, 2025 02:33	37,216	42,513,017	20,558,000	1,027,000	2,437,120
63	Dec 22, 2025 02:57	37,221	44,692,034	20,560,000	1,028,000	2,355,200
64	Dec 22, 2025 02:36	37,302	60,015,531	20,605,000	1,030,000	2,310,144
65	Dec 22, 2025 02:03	37,353	48,092,321	20,634,000	1,031,000	2,265,088
66	Dec 22, 2025 02:29	37,381	50,268,458	20,649,000	1,032,000	2,338,816
67	Dec 22, 2025 02:36	37,390	53,609,165	20,654,000	1,032,000	2,359,296
68	Dec 22, 2025 02:30	37,428	47,344,510	20,675,000	1,033,000	2,416,640
69	Dec 22, 2025 02:56	37,467	48,324,613	21,731,000	0	2,416,640
70	Dec 22, 2025 02:56	37,491	48,231,851	21,745,000	0	2,461,696
71	Dec 22, 2025 02:30	37,550	55,148,382	20,742,000	1,037,000	2,420,736
72	Dec 22, 2025 02:56	37,760	48,124,472	20,906,000	995,000	2,502,656
73	Dec 22, 2025 02:30	37,760	51,367,339	18,915,000	2,986,000	2,383,872
74	Dec 22, 2025 02:56	37,762	48,166,435	20,907,000	995,000	2,404,352
75	Dec 22, 2025 02:35	37,766	45,908,850	19,913,000	1,991,000	2,273,280
76	Dec 22, 2025 02:36	37,783	47,774,115	20,918,000	996,000	2,445,312
77	Dec 22, 2025 02:36	37,872	50,839,252	20,968,000	998,000	2,318,336
78	Dec 22, 2025 02:36	37,888	54,961,483	19,978,000	1,997,000	2,322,432
79	Dec 22, 2025 02:30	37,897	51,039,470	19,982,000	1,998,000	2,392,064
80	Dec 22, 2025 03:36	37,922	46,670,310	19,996,000	1,999,000	2,445,312
81	Dec 22, 2025 02:12	37,978	43,840,718	21,026,000	1,001,000	2,285,568
82	Dec 22, 2025 02:12	38,012	47,093,650	20,043,000	2,004,000	2,334,720
83	Dec 22, 2025 02:56	38,029	47,800,424	21,055,000	1,002,000	2,433,024
84	Dec 22, 2025 02:56	38,288	46,147,382	21,198,000	1,009,000	2,498,560

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