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  1. Prepare
  2. Algorithms
  3. Strings
  4. Sherlock and the Valid String
  5. Discussions

Sherlock and the Valid String

  • embrown801
     + 0 comments

    Counter is nice.

    def isValid(s):
    counts = dict(Counter(s))
    count_freqs = dict(Counter(counts.values()))
    if len(count_freqs) == 1:
        return 'YES'
    elif len(count_freqs) > 2:
        return 'NO'
    elif count_freqs.get(1, 0) == 1:
        return 'YES'
    elif abs(list(count_freqs.keys())[-1] - list(count_freqs.keys())[0]) == 1 and count_freqs[max(list(count_freqs.keys()))] == 1:
        return 'YES'
    
    return 'NO'