[9기 심화] 9주차

백준 1157 - python

word = input().upper()
word_list = list(set(word))

time = []

for i in word_list:
    count = word.count(i)
    time.append(count)

if time.count(max(time)) >= 2:
    print('?')
else:
    print(word_list[time.index(max(time))])

 

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