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Jan 14th, 2020
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  1. def gcd(a, b):
  2. while a != 0 and b != 0:
  3. if a > b:
  4. a %= b
  5. else:
  6. b %= a
  7. return a+b
  8.  
  9.  
  10. a, b, c, d, N, n = [int(i) for i in input().split()]
  11. l, r = a / b, c / d
  12. e, f = 1, 1
  13. arr = []
  14. num = 0
  15. while len(arr) < n:
  16. while e <= N and e / f <= l:
  17. e += 1
  18. if e / f >= r:
  19. e = 1
  20. f += 1
  21. while f <= N and e / f >= r:
  22. f += 1
  23. if e > N or f > N:
  24. break
  25. if l < e / f < r:
  26. if gcd(e, f) == 1:
  27. arr.append([e, f])
  28. if e < N:
  29. e += 1
  30. else:
  31. f += 1
  32. e = 1
  33. print(len(arr))
  34. for i in arr:
  35. print(i[0], i[1])
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