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  1. n = int(input())
  2. num = 0
  3.  
  4. for j in range(n):
  5.     x = list(input())
  6.     x_uni = list(set(x))
  7.     for i in range(len(x_uni)):
  8.         if x[int(x.index(x_uni[i]))+int(x.count(x_uni[i]))-1] != x_uni[i]:
  9.             num += 1
  10.             break
  11.  
  12. print(n-num)
Success #stdin #stdout 0.02s 9384KB
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https://ideone.com/bszuiP
language:
Python 3 (python  3.9.5)
created:
2 years ago
visibility:
public

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