#!/usr/bin/python
# -*- coding: UTF-8 -*-
x2 = 1
for day in range(9,0,-1):
x1 = (x2 + 1) * 2
x2 = x1
print x1
range(self, begin, stop, step)
#!/usr/bin/python
# -*- coding: UTF-8 -*-
x2 = 1
for day in range(9,0,-1):
x1 = (x2 + 1) * 2
x2 = x1
print x1
range(self, begin, stop, step)
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