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| import re | |
| pattern = re.compile('(\d*)(00|11|22|33|44|55|66|77|88|99)(\d*)') | |
| n = 0 | |
| for i in range(1, 10000): | |
| s = str(i) | |
| if pattern.match(s): | |
| n += 1 | |
| print 9999 - n |
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