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  1. import numpy as np
  2.  
  3. def era(N):
  4.   P = np.ndarray((N, 2), np.int8)
  5.   for _ in range(0, N): P[_] = (_ + 1, 1)
  6.   for k in range(1, int(np.sqrt(N))):
  7.     for _ in range(1, int(N / (k + 1))):
  8.       P[(_ + 1) * (k + 1) - 1][1] = 0
  9.   for _ in range(1, N):
  10.     if P[_][1]: print _ + 1
  11.  
  12. era(100)
Runtime error #stdin #stdout #stderr 0.01s 119552KB
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Standard input is empty
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Standard output is empty
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Traceback (most recent call last):
  File "prog.py", line 1, in <module>
    import numpy as np
ImportError: No module named numpy
https://ideone.com/wFlLXl
language:
Python (PyPy 2.7.13)
created:
7 years ago
visibility:
public

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