6 kyu
Simple Fun #162: Pair Wise
183 of 526myjinxin2015
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Algorithms
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Very good Kata! Thanks to author!!!
Haskell translation
Approved by Johan
python new test framework is required. updated in this fork
Approved
I cant figure this out "Note that any element of the array can only be counted in one Perfect Pair. Also if there are multiple correct answers, return the smallest one.", I dont understant why the answer to the following case is 10 and not 15.
kata.Pairwise(new int[]{0, 0, 0, 0, 1, 1},1);
if in the previous case the answer is 10, then what is the answer of the following:
kata.Pairwise(new int[]{0, 0, 1, 1, 0, 0},1);
In the first case, the pairs of indices are
0,4and1,5, summing to10.In the second case, the pairs are
0,2and1,3, summing to6.In both cases, use both
1s once ( "element .. can only be counted in one Pair" ), and use the0s at indices0and1( "return the smallest [ correct answer ]" ).I have no idea how you would arrive at
15; it might have helped if you had explained that.Ruby translation should be updated 3.0, see relevent information here: https://github.com/codewars/content-issues/wiki/List-of-Ruby-Kata-to-Update
Enabled in this fork + Tests clean up
C# Random Test for: arr = new int[]{9, 1, 1, 6, 2, 11, 9, 1, 4} n = 6
Test Failed Expected: 12 But was: 1
Should be 1 because there is only one pair: 2+4 !
Read the description again... You need to return sum of INDICES.
OK. It's working. I misunderstood description.
Awaiting moderator approval