Problem statement is not clear

#1

I am not clear with this problem.Can you please give an example and explain

#2

lets see breaking of a number
9
4 1 4
2 0 2 1 2 0 2
1 0 1 0 1 0 1 1 1 0 1 0 1 0 1

firstly 9 broke up
then 4 broke up
then 2 broke up
rest is written as it is

#3

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