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   Right angle Triangle Problem
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   Author  Topic: Right angle Triangle Problem  (Read 3247 times)
sumtatt
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Right angle Triangle Problem  
« on: Jan 10th, 2012, 5:44am »
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There is array of some number of integers, find the combination of all number which make the right angle triangle.
i.e  
int a[9] = (1,2,3,4,5,6,7,8,10);  
 
Answer should be (3,4,5) (6,8,10)
 
Kindly provide the link if it has already asked.
« Last Edit: Jan 10th, 2012, 8:12pm by sumtatt » IP Logged
Grimbal
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Re: Rectangle Triangle Problem  
« Reply #1 on: Jan 10th, 2012, 6:49am »
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I don't understand what you mean by "make the rectangle triangle.
Also, in your output there is a 5, which is not in the input.  Is that normal?
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towr
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Re: Rectangle Triangle Problem  
« Reply #2 on: Jan 10th, 2012, 8:37am »
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I think he means Pythagorean triangles.
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Wikipedia, Google, Mathworld, Integer sequence DB
Grimbal
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Re: Rectangle Triangle Problem  
« Reply #3 on: Jan 10th, 2012, 9:46am »
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Makes sense.
 
One method would be to take every pair in the set as the first 2 numbers and do a binary search for the third.
 
Another method would be to generate all triples up to the maximum number in the set and check each triple if it's in the set.
 
The first method would be best if the numbers are few and very large.  The second if the numbers are many and relatively small.
« Last Edit: Jan 10th, 2012, 9:49am by Grimbal » IP Logged
sumtatt
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Re: Rectangle Triangle Problem  
« Reply #4 on: Jan 10th, 2012, 11:29am »
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Thanks!
 
What will be the complexity for the same.
 
Can you write the algorithm please?
 
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sumtatt
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Re: Rectangle Triangle Problem  
« Reply #5 on: Jan 10th, 2012, 11:32am »
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Sorry Grimbal.. I have corrected the question.
I think i have lost my mind when i was writing.
My apologies.
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