codeingame/xml_mdf.py

'''
> https://www.codingame.com/ide/puzzle/xml-mdf-2016
@author: olivier.massot, 2019
'''

s = "ab-bcd-d-c-ae-e"

opened, depth, score = True, 0, {}

for c in s:
    if c == '-':
        opened = False
    elif opened:
        depth += 1
    else:
        score[c] = score.get(c, 0) + 1 / depth
        depth -= 1
        opened = True

print(score)
print(max(score, key=score.get))