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  1. Prepare
  2. Algorithms
  3. Implementation
  4. Non-Divisible Subset
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Non-Divisible Subset

  • mrweisu
     + 0 comments

    Python 3

    from math import floor

    def nonDivisibleSubset(k, s): # Write your code here

    s = [i % k for i in s]

freq = {i: 0 for i in range(k)}

for i in s:
    freq[i] += 1

ans = 0

for i in range(1, floor(k/2)+1):

    if i == k/2:
        continue

    if freq[i] >= freq[k-i]:
        del freq[k-i]
        ans += freq[i]
    else:
        del freq[i]
        ans += freq[k-i]

if k/2 in freq and freq[k/2] != 0:
    ans += 1

if freq[0] != 0:
    ans += 1

return ans