34 lines
726 B
Python
34 lines
726 B
Python
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import io
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import sys
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sys.stdin = io.StringIO('edda')
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sys.stdin = io.StringIO('sdfhhhhcvhhxcxnnnnshh')
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s_in = f"EMPTY{input()}"
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while True:
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flag = True
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del_index = set()
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for i in range(5, len(s_in) - 1):
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if s_in[i - 1] == s_in[i] and s_in[i] != s_in[i + 1]:
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del_index.add(i)
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del_index.add(i + 1)
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elif s_in[i - 1] != s_in[i] and s_in[i] == s_in[i + 1]:
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del_index.add(i - 1)
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del_index.add(i)
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if del_index:
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flag = False
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s = ''
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for idx, ch in enumerate(s_in):
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if idx in del_index:
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continue
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s += ch
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s_in = s
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if flag:
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break
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print(s_in if s_in == 'EMPTY' else s_in.replace('EMPTY', ''))
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