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PON - Prime or Not |
Given the number, you are to answer the question: "Is it prime?"
Solutions to this problem can be submitted in C, C++, Pascal, Perl, Python, Ruby, Lisp, Hask, Ocaml, Prolog, Whitespace, Brainf**k and Intercal only.
Input
t – the number of test cases, then t test cases follows. [t <= 500]
Each line contains one integer: N [2 <= N <= 2^63-1]
Output
For each test case output string "YES" if given number is prime and "NO" otherwise.
Example
Input: 5 2 3 4 5 6 Output: YES YES NO YES NO
Added by: | Roman Sol |
Date: | 2005-01-24 |
Time limit: | 21s |
Source limit: | 5000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: ADA95 ASM32 BASH CSHARP CLPS D ERL FORTRAN ICON JAVA JS-RHINO LUA NEM NICE PHP PIKE ST |
Resource: | ZCon 2005 |
hide comments
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2013-11-23 15:12:16 knb_dtu
Miller Rabin |
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2013-11-06 23:02:24 Wei Qiu
Hi,all how do you get around the int overflow problem. In my algorithm ,when I calculate the modular exponentiation, I need to calculate 2^63 * 2^63 which leads to int overflow. EDIT: ok, i get it, I should also do the multiplication in a similar way. Last edit: 2013-11-06 23:15:54 |
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2013-10-23 20:52:39 AlcatraZ
Nice problem.. Learned something new. Last edit: 2013-10-30 00:06:54 |
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2013-09-22 17:16:30 P_Quantum
Nice one..!! Learned a lot..:) |
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2013-08-26 16:13:37 The Terminator
acc in little fermat don't forget to use long long |
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2013-08-16 20:21:00 Dragan MarkoviƦ
Fermat's primality test is awesome. |
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2013-08-15 17:00:21 Lakshay Singhal
gr8 question...learnt smthng new @hariprasath:ans for 9223372036854775783 is NO.... |
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2013-06-17 09:13:33 Bharath Reddy
1 iteration Miller Rabin enough.. Great question!! |
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2013-06-02 16:16:02 Himanshu
really very good question learn a lot.... need 2 iterations of little fermit theorm. thnaks to TOPCODER |
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2013-05-19 20:26:17 Chandan Mittal
using MR test.. all my answers are correct but still getting WA here :( AC :) just had an integer overflow problem Last edit: 2013-05-21 23:37:09 |