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  1. s = input()
  2. arr = [0 for i in range(26)]
  3. cnt = 0
  4. for i in range(len(s)):
  5.     if 'a'<= s[i] <= 'z':
  6.         arr[ord(s[i])-97] += 1
  7.     elif 'A' <= s[i] <= 'Z':
  8.         arr[ord(s[i])-65] += 1
  9. max = max(arr)
  10. for i in range(26):
  11.     if cnt > 1:
  12.         print('?')
  13.         break
  14.     if arr[i] == max:
  15.         cnt += 1
  16. if cnt == 1:
  17.     print(chr(arr.index(max)+65))
Success #stdin #stdout 0.02s 9172KB
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https://ideone.com/J0kfRM
language:
Python 3 (python  3.9.5)
created:
1 year ago
visibility:
public

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