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 27, 2025 20:48

Josu San MartinScore: 22,030Success

Source Code

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Challenge History

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Run Statistics

#	Date	Score	Wall Time	CPU User	CPU System	Memory
1	Dec 27, 2025 20:48	21,912	754,985,182	711,096,000	12,001,000	2,285,568
2	Dec 27, 2025 20:46	21,921	752,487,455	708,399,000	14,987,000	2,408,448
3	Dec 27, 2025 20:46	21,922	752,222,441	706,449,000	16,986,000	2,473,984
4	Dec 27, 2025 20:48	21,922	755,358,419	706,427,000	16,986,000	2,293,760
5	Dec 27, 2025 20:46	21,923	750,211,162	708,458,000	14,988,000	2,277,376
6	Dec 27, 2025 20:48	21,941	747,648,340	708,050,000	16,001,000	2,498,560
7	Dec 27, 2025 20:48	21,951	752,585,596	708,397,000	15,986,000	2,293,760
8	Dec 27, 2025 20:48	21,953	751,072,922	708,457,000	15,987,000	2,363,392
9	Dec 27, 2025 20:48	21,954	753,030,612	710,504,000	13,990,000	2,293,760
10	Dec 27, 2025 20:48	21,965	751,743,977	709,848,000	14,996,000	2,310,144
11	Dec 27, 2025 20:48	21,970	750,165,402	712,020,000	13,000,000	2,277,376
12	Dec 27, 2025 20:48	21,972	754,733,536	705,088,000	20,002,000	2,420,736
13	Dec 27, 2025 20:46	21,973	749,607,326	710,093,000	15,001,000	2,396,160
14	Dec 27, 2025 20:48	21,980	754,844,042	705,350,000	19,981,000	2,486,272
15	Dec 27, 2025 20:48	21,981	752,744,142	708,379,000	16,985,000	2,293,760
16	Dec 27, 2025 20:48	21,981	753,612,782	709,398,000	15,986,000	2,531,328
17	Dec 27, 2025 20:48	21,986	755,318,803	711,535,000	13,990,000	2,334,720
18	Dec 27, 2025 20:46	22,010	750,779,179	707,358,000	18,982,000	2,342,912
19	Dec 27, 2025 20:46	22,028	758,547,532	711,924,000	14,998,000	2,457,600
20	Dec 27, 2025 20:48	22,030	750,754,756	713,999,000	12,999,000	2,273,280
21	Dec 27, 2025 20:48	22,031	752,489,690	711,021,000	16,000,000	2,523,136
22	Dec 27, 2025 20:48	22,040	752,940,783	713,348,000	13,987,000	2,301,952
23	Dec 27, 2025 20:48	22,041	753,175,194	708,384,000	18,983,000	2,281,472
24	Dec 27, 2025 20:48	22,058	750,649,998	709,904,000	17,997,000	2,449,408
25	Dec 27, 2025 20:48	22,073	761,150,651	711,434,000	16,986,000	2,281,472
26	Dec 27, 2025 20:46	22,073	756,074,184	711,418,000	16,986,000	2,289,664
27	Dec 27, 2025 20:48	22,077	754,659,931	709,549,000	18,987,000	2,289,664
28	Dec 27, 2025 20:48	22,080	751,984,515	714,662,000	13,993,000	2,478,080
29	Dec 27, 2025 20:48	22,084	757,117,888	713,779,000	14,995,000	2,473,984
30	Dec 27, 2025 20:48	22,096	764,616,653	714,176,000	15,003,000	2,273,280
31	Dec 27, 2025 20:48	22,130	760,827,443	714,309,000	15,984,000	2,277,376
32	Dec 27, 2025 20:48	22,132	761,753,867	715,365,000	14,986,000	2,289,664
33	Dec 27, 2025 20:48	22,133	762,871,247	713,399,000	16,985,000	2,306,048
34	Dec 27, 2025 20:48	22,146	759,450,125	717,828,000	12,996,000	2,400,256
35	Dec 27, 2025 20:48	22,300	765,123,828	718,892,000	16,997,000	2,433,024
36	Dec 27, 2025 20:48	22,600	776,207,431	730,820,000	14,996,000	2,330,624
37	Dec 27, 2025 20:46	22,669	774,256,160	736,100,000	11,985,000	2,289,664
38	Dec 27, 2025 20:48	22,679	778,592,715	729,407,000	18,984,000	2,285,568
39	Dec 27, 2025 20:46	22,714	776,122,338	732,561,000	16,989,000	2,293,760

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