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  1. def fn():
  2.     n = 10
  3.     matrix = [[5, 14], [14, 17], [8, 13], [13, 15], [15, 17], [3, 6], [4, 7], [6, 9], [11, 14], [10, 11]]
  4.     print(matrix)
  5.     matrix = sorted(matrix, key = lambda x: x[1])
  6.     curr = matrix[0][1]
  7.     count = 1
  8.     for i in range(1, n):
  9.         if matrix[i][0]>=curr:
  10.            curr = matrix[i][1]
  11.            count+=1
  12.     print("Count =", count)
  13. fn()
Success #stdin #stdout 0.03s 9472KB
comments (?)
stdin 
Standard input is empty
stdout 
[[5, 14], [14, 17], [8, 13], [13, 15], [15, 17], [3, 6], [4, 7], [6, 9], [11, 14], [10, 11]]
Count = 5
https://ideone.com/KCtxr6
Spectacles Problem - matrix input
language:
Python 3 (python  3.9.5)
created:
267 days ago
visibility:
secret

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