PYTHON TIPS FOR PROGRAM TO AVOID IDENTANTION ERROR IN PA

1.There is no big difference between python 2 and 3 , only the difference are getting input    and printing statement that already given in the question

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2.But u didn't confuse in main part because input type of int as int (input()) [python 3] and input type of str as raw_input() [python 2] 

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3.just write the main code without indentation at first and then give the indentation for all and it will work

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4.I analysis the problem each get automatically extent the identation 

After the whole code , u should check each line with identation (4 space )

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