Unique strings

Count the exact number of unique tokens as fast as possible.

Input

One token per line on STDIN:

JWXcKKaWzvFL5
Rof
3ztCpA
5wHcGN
*UiEMthaTS*g

Output

Print the exact count of unique tokens to STDOUT.

Constraints

Character set: 0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@#%*
Maximum token length: 16
Approximately 1,000,000 unique tokens

Restrictions:20s512Mb 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 29, 2024 17:02

Yuriy Lyfenko

Score: 8,491

Success

Source Code

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Challenge History

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Oct 10, 2025 05:34	8,352	299,750,751	269,611,000	5,991,000	2,285,568
2	Oct 10, 2025 05:34	8,385	304,835,624	271,725,000	4,994,000	2,519,040
3	Oct 10, 2025 05:34	8,388	302,530,123	271,808,000	4,996,000	2,285,568
4	Oct 10, 2025 05:34	8,399	303,553,461	271,150,000	6,003,000	2,519,040
5	Dec 29, 2024 16:55	8,409	307,425,357	272,500,000	4,990,000	2,506,752
6	Dec 29, 2024 16:55	8,417	300,150,939	272,758,000	4,995,000	2,510,848
7	Dec 29, 2024 16:55	8,419	305,085,362	271,839,000	5,996,000	2,424,832
8	Oct 10, 2025 05:34	8,438	306,785,781	272,480,000	5,988,000	2,506,752
9	Dec 29, 2024 16:55	8,442	308,608,111	271,599,000	6,989,000	2,506,752
10	Dec 29, 2024 16:58	8,450	304,010,032	274,846,000	3,997,000	2,510,848
11	Nov 28, 2025 19:17	8,451	306,250,998	272,899,000	5,997,000	2,297,856
12	Nov 28, 2025 19:17	8,453	302,329,816	272,954,000	5,998,000	2,510,848
13	Nov 19, 2025 17:53	8,458	304,882,118	273,123,000	6,002,000	2,502,656
14	Dec 29, 2024 17:04	8,459	306,869,746	273,144,000	6,003,000	2,486,272
15	Dec 29, 2024 16:55	8,473	302,282,644	273,626,000	5,991,000	2,490,368
16	Oct 10, 2025 05:34	8,474	303,418,409	275,661,000	3,995,000	2,510,848
17	Dec 29, 2024 16:58	8,491	308,822,681	275,213,000	5,003,000	2,510,848
18	Dec 29, 2024 16:55	8,495	305,350,351	277,342,000	3,003,000	2,293,760
19	Dec 29, 2024 16:55	8,497	315,249,477	274,406,000	5,987,000	2,510,848
20	Oct 10, 2025 05:34	8,515	308,540,555	275,998,000	4,999,000	2,510,848
21	Nov 19, 2025 17:53	8,530	306,057,429	275,499,000	5,989,000	2,289,664
22	Dec 29, 2024 16:55	8,531	310,381,145	276,538,000	4,991,000	2,420,736
23	Nov 19, 2025 17:53	8,538	312,138,801	275,756,000	5,994,000	2,510,848
24	Oct 10, 2025 05:34	8,541	304,974,792	276,842,000	4,997,000	2,506,752
25	Nov 28, 2025 19:17	8,544	306,308,409	277,942,000	3,999,000	2,338,816
26	Dec 29, 2024 17:04	8,551	307,201,978	276,192,000	6,004,000	2,347,008
27	Dec 29, 2024 16:55	8,556	315,515,378	276,336,000	6,007,000	2,318,336
28	Dec 29, 2024 17:02	8,568	303,440,535	279,754,000	2,997,000	2,510,848
29	Dec 29, 2024 16:58	8,583	309,588,627	277,249,000	6,005,000	2,412,544
30	Dec 29, 2024 17:02	8,595	310,267,252	276,633,000	6,990,000	2,510,848
31	Dec 29, 2024 17:04	8,602	306,461,910	279,865,000	3,998,000	2,519,040
32	Dec 29, 2024 17:02	8,781	310,238,727	284,774,000	4,996,000	2,453,504
33	Oct 10, 2025 05:34	8,873	322,592,115	286,823,000	5,996,000	2,510,848

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