new_contents: def solution(chapters, k):
      count = 0
      page  = 0
  
      for probCount in chapters:    
          for problem in range(1, 1 + probCount):
              if (problem - 1) % k == 0:
                  page += 1
                  
              if problem == page:
                  count += 1
                  
      return count
  
  n, k  = map(int, input().split())
  t     = map(int, input().split())
  count = solution(t, k)
  
  print(count)
  
subject: Create solution.py