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 listJan 8, 2026 23:37

Josu San MartinScore: 9,206Success

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Challenge History

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Jan 8, 2026 19:07	9,074	324,452,172	293,455,000	5,988,000	2,379,776
2	Jan 8, 2026 18:57	9,097	326,076,901	298,198,000	2,001,000	2,412,544
3	Jan 8, 2026 18:57	9,128	328,698,746	297,209,000	4,002,000	2,502,656
4	Jan 8, 2026 20:33	9,134	331,337,695	296,436,000	4,990,000	2,428,928
5	Jan 8, 2026 20:43	9,140	329,016,045	297,618,000	3,994,000	2,375,680
6	Jan 8, 2026 20:43	9,144	333,750,249	298,743,000	2,997,000	2,387,968
7	Jan 8, 2026 20:43	9,154	332,768,614	300,098,000	2,000,000	2,379,776
8	Jan 8, 2026 19:07	9,154	326,728,595	299,079,000	3,000,000	2,367,488
9	Jan 8, 2026 18:57	9,164	329,080,443	297,420,000	5,007,000	2,289,664
10	Jan 8, 2026 19:07	9,164	325,571,962	298,397,000	4,005,000	2,506,752
11	Jan 8, 2026 20:43	9,165	329,630,535	299,443,000	3,004,000	2,371,584
12	Jan 8, 2026 18:57	9,168	334,831,183	297,567,000	4,992,000	2,412,544
13	Jan 8, 2026 20:43	9,170	333,791,816	298,602,000	3,994,000	2,437,120
14	Jan 8, 2026 20:33	9,172	334,622,192	298,675,000	3,995,000	2,387,968
15	Jan 8, 2026 19:07	9,188	328,076,803	298,203,000	5,003,000	2,277,376
16	Jan 8, 2026 20:33	9,191	334,366,955	298,289,000	5,004,000	2,334,720
17	Jan 8, 2026 20:43	9,194	330,746,757	299,386,000	4,005,000	2,473,984
18	Jan 8, 2026 18:57	9,198	331,857,270	298,545,000	4,992,000	2,371,584
19	Jan 8, 2026 19:07	9,206	332,401,575	298,806,000	4,996,000	2,523,136
20	Jan 8, 2026 18:57	9,218	327,373,011	301,206,000	3,002,000	2,273,280
21	Jan 8, 2026 18:57	9,237	333,367,395	301,831,000	2,998,000	2,375,680
22	Jan 8, 2026 19:07	9,243	331,272,023	301,013,000	4,000,000	2,379,776
23	Jan 8, 2026 19:07	9,252	334,626,936	301,319,000	3,990,000	2,301,952
24	Jan 8, 2026 18:57	9,260	331,468,372	302,600,000	2,996,000	2,465,792
25	Jan 8, 2026 18:57	9,261	332,210,563	299,628,000	5,992,000	2,371,584
26	Jan 8, 2026 19:07	9,291	334,575,562	302,608,000	3,994,000	2,379,776
27	Jan 8, 2026 20:33	9,311	333,473,400	303,273,000	4,003,000	2,375,680
28	Jan 8, 2026 19:07	9,348	337,524,653	304,496,000	3,993,000	2,510,848
29	Jan 8, 2026 20:33	9,384	340,672,991	305,662,000	3,995,000	2,383,872
30	Jan 8, 2026 20:33	9,660	345,462,613	314,771,000	3,997,000	2,396,160
31	Jan 9, 2026 02:39	11,121	394,191,595	359,988,000	6,999,000	2,371,584
32	Jan 8, 2026 23:37	11,156	391,630,958	362,135,000	6,002,000	2,367,488
33	Jan 9, 2026 02:39	11,178	395,369,111	359,871,000	8,996,000	2,359,296
34	Jan 8, 2026 23:37	11,183	398,667,320	363,054,000	6,000,000	2,363,392
35	Jan 9, 2026 02:39	11,212	396,979,942	362,981,000	6,999,000	2,367,488
36	Jan 8, 2026 23:37	11,218	394,120,672	362,203,000	8,004,000	2,363,392

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