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f=lambda s,c=0:s[1:]and f(min(s).join(`eval(s)`),c+1)or(s,c)
 
for s in '81+31', '351+14568', '21*111', '136*2356':
	print '%-9s --> %s' % (s, f(s))

Success #stdin #stdout 0s 9024KB

stdin

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Standard input is empty

stdout

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81+31     --> ('4', 2)
351+14568 --> ('6', 3)
21*111    --> ('8', 3)
136*2356  --> ('0', 2)

https://ideone.com/uC30St

language:

Python (cpython 2.7.16)

created:

visibility:

public

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