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 15, 2026 03:02

Josu San MartinScore: 13,523Success

Source Code

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Challenge History

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Jan 15, 2026 03:04	13,423	475,300,330	371,961,000	70,992,000	2,424,832
2	Jan 15, 2026 03:01	13,426	470,737,643	367,050,000	76,010,000	2,424,832
3	Jan 15, 2026 02:58	13,432	472,213,514	377,368,000	65,889,000	2,289,664
4	Jan 15, 2026 03:03	13,436	467,968,064	363,490,000	79,888,000	2,420,736
5	Jan 15, 2026 03:02	13,439	465,379,073	369,585,000	73,917,000	2,289,664
6	Jan 15, 2026 03:05	13,445	471,091,360	365,741,000	77,944,000	2,424,832
7	Jan 15, 2026 02:59	13,447	471,612,328	361,801,000	81,954,000	2,277,376
8	Jan 15, 2026 02:59	13,454	467,541,373	358,981,000	84,995,000	2,424,832
9	Jan 15, 2026 02:57	13,467	477,956,164	365,509,000	78,894,000	2,420,736
10	Jan 15, 2026 02:58	13,468	465,678,915	378,532,000	65,918,000	2,289,664
11	Jan 15, 2026 02:58	13,480	470,997,247	365,863,000	78,970,000	2,424,832
12	Jan 15, 2026 03:03	13,487	467,083,044	375,059,000	70,011,000	2,293,760
13	Jan 15, 2026 03:06	13,494	470,768,547	376,399,000	68,890,000	2,289,664
14	Jan 15, 2026 03:01	13,497	472,325,109	384,478,000	60,917,000	2,424,832
15	Jan 15, 2026 03:07	13,500	472,451,636	363,587,000	81,906,000	2,424,832
16	Jan 15, 2026 03:05	13,517	469,252,132	367,057,000	79,012,000	2,424,832
17	Jan 15, 2026 03:07	13,523	471,680,241	389,351,000	56,905,000	2,277,376
18	Jan 15, 2026 03:06	13,529	470,813,171	368,565,000	77,908,000	2,428,928
19	Jan 15, 2026 03:06	13,532	472,947,002	373,633,000	72,928,000	2,289,664
20	Jan 15, 2026 03:04	13,535	468,873,083	370,709,000	75,940,000	2,293,760
21	Jan 15, 2026 03:01	13,538	476,606,537	372,807,000	73,961,000	2,424,832
22	Jan 15, 2026 02:57	13,539	468,449,052	376,816,000	69,965,000	2,408,448
23	Jan 15, 2026 03:00	13,541	467,490,927	388,874,000	57,981,000	2,424,832
24	Jan 15, 2026 03:00	13,541	473,299,110	363,872,000	82,970,000	2,428,928
25	Jan 15, 2026 02:59	13,541	465,292,659	380,872,000	65,977,000	2,420,736
26	Jan 15, 2026 02:57	13,545	475,426,274	387,989,000	58,998,000	2,404,352
27	Jan 15, 2026 03:02	13,547	468,403,190	374,041,000	73,008,000	2,424,832
28	Jan 15, 2026 03:05	13,555	474,845,170	373,416,000	73,884,000	2,424,832
29	Jan 15, 2026 03:02	13,555	471,899,547	373,436,000	73,888,000	2,277,376
30	Jan 15, 2026 03:07	13,560	474,015,733	372,580,000	74,915,000	2,424,832
31	Jan 15, 2026 03:04	13,565	474,024,996	384,706,000	62,951,000	2,424,832
32	Jan 15, 2026 03:03	13,568	472,072,041	379,795,000	67,963,000	2,277,376
33	Jan 15, 2026 03:00	13,575	472,894,251	375,986,000	71,997,000	2,289,664

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