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 CodingForums.com Find the fixed point of an array ...i.e return i if a[i]=i..

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 11-08-2011, 07:00 AM PM User | #1 sr4cafe New to the CF scene   Join Date: Nov 2011 Posts: 1 Thanks: 0 Thanked 0 Times in 0 Posts Find the fixed point of an array ...i.e return i if a[i]=i.. Write a C program for the following algorithm OBJECTIVE: Find the "fixed point" of an array Input: an array A of *distinct* integers in ascending order. (Remember that integers can be negative!) The number of integers in A is n. Output: one position k in the list, such that A[i]=i, if any exists. Otherwise: "No". method 1 : If A [ i ] > i , we can ignore the right half of the array because in right half ,for all j > i , we must have A [ j ] > j since A [ i ] > i, as all the numbers are distinct. Similarly , if A [ i ] < i, we can ignore the left half of the array because in left half, for all j < i , we must have A [ j ] < j since A [ i ] < i ,as all the numbers are distinct. method 2: n = size of array take it=n/2 iterate till it>0&&itit) it=it/2 else if(A[it]
 11-11-2011, 09:51 PM PM User | #2 bobleny Regular Coder     Join Date: May 2007 Posts: 256 Thanks: 3 Thanked 11 Times in 11 Posts Oh that's cool. Did you need help with something? __________________ --www.firemelt.net-- * No good deed goes unpunished. * Cheer up, the worst has yet to come... Get Firefox!

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