Codeforces Problem 1917 A constructive algorithms math*800

~ Question summary
This question says that we have given the elements and if there is one element in the array
we have to convert him to 0 and see that if the value is low than the n so we have to make it
and convert it in the multiplication form and sum it it up if there are more elements than
1 so make it sum up and then check

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