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INTEST - Enormous Input Test |
The purpose of this problem is to verify whether the method you are using to read input data is sufficiently fast to handle problems branded with the enormous Input/Output warning. You are expected to be able to process at least 2.5MB of input data per second at runtime.
Input
The input begins with two positive integers n k (n, k<=107). The next n lines of input contain one positive integer ti, not greater than 109, each.
Output
Write a single integer to output, denoting how many integers ti are divisible by k.
Example
Input: 7 3 1 51 966369 7 9 999996 11 Output: 4
Added by: | adrian |
Date: | 2004-11-09 |
Time limit: | 2.112s |
Source limit: | 50000B |
Memory limit: | 1536MB |
Cluster: | Cube (Intel G860) |
Languages: | All except: NODEJS PERL6 VB.NET |
Resource: | Idea put forward by Michael Mendelsohn |
hide comments
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2014-02-09 08:57:49 Rafael Perrella
How to get 0.5s in C/C++? I can't make it go lower than 0.7s... |
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2013-11-10 17:41:50 Shashank Gupta
@numerix OK I'll look, thanks. :) |
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2013-11-10 17:33:11 numerix
@Shashank Gupta: You will find some hints according this question on the SPOJ forum (Python subforum). If you do not find what you are looking for, you may ask there. |
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2013-11-10 17:21:25 Shashank Gupta
@numerix Can you give me a hint in figuring out how? Maybe cStringIO? I'm not able to use Python for a lot of problems because I'm just stuck on the input :\ I have to use C/C++. |
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2013-11-10 14:29:29 numerix
@Shashank Gupta: You can get AC with Python without psyco. But it's not easily done. |
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2013-11-10 08:04:31 Shashank Gupta
To do this in Python, you need psyco, but psyco is no longer available in SPOJ. In a C/C++ like language use a large character buffer and parse the input yourself rather than using formatted strings/iostreams. Of course, it's easy to go under the time limit using just scanf/printf or sync_with_stdio = False, but you won't get "super" speed. ;) Last edit: 2013-11-10 08:06:37 |
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2013-08-03 22:03:25 Mohammed Hafez
OK, I get 0.81 sec 1. How to make my solution faster? 2. @richi18007 How can saving the input in an array (storing large numbers) and then processing it make it faster? "I calculate on the fly" !!! Thanks :) Last edit: 2013-09-03 17:05:51 |
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2013-07-10 19:29:45 Mitch Schwartz
@Adamax: A problem may have multiple data sets (where a data set is an input file paired with an output file), and the total time is the sum of the times for each data set. Last edit: 2013-07-10 19:34:25 |
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2013-07-10 18:23:06 Adamax
What is the actual time limit for this problem? It says 8s, but solutions taking over 10 seconds are accepted. |
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2012-06-11 20:57:35 Shubham
@Daniel Yes,I got the same results as well :) |