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  1. def print_spiral(matrix):
  2.     if not matrix or not matrix[0]:
  3.         return
  4.  
  5.     top, bottom = 0, len(matrix) - 1
  6.     left, right = 0, len(matrix[0]) - 1
  7.  
  8.     while top <= bottom and left <= right:
  9.         # Print the top row
  10.         for i in range(left, right + 1):
  11.             print(matrix[top][i], end=" ")
  12.         top += 1
  13.  
  14.         # Print the right column
  15.         for i in range(top, bottom + 1):
  16.             print(matrix[i][bottom], end=" ")
  17.         right -= 1
  18.  
  19.         if top <= bottom:
  20.             # Print the bottom row
  21.             for i in range(right, left - 1, -1):
  22.                 print(matrix[right][i], end=" ")
  23.             bottom -= 1
  24.  
  25.         if left <= right:
  26.             # Print the left column
  27.             for i in range(bottom, top - 1, -1):
  28.                 print(matrix[i][left], end=" ")
  29.             left += 1
  30.  
  31. # Example usage:
  32. matrix = [
  33.     [1, 2, 3, 4],
  34.     [5, 6, 7, 8],
  35.     [9, 10, 11, 12],
  36.     [13, 14, 15, 16]
  37. ]
  38.  
  39. print_spiral(matrix)
Success #stdin #stdout 0.04s 9628KB
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1 2 3 4 8 12 16 11 10 9 9 5 6 7 11 6
https://ideone.com/JV5dbT
language:
Python 3 (python  3.9.5)
created:
6 days ago
visibility:
public

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