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Array Sum and Product Equation

EasyP3Coding

Let S be the sum of the elements of arr and P their product. Return 7 * S + 9 * P.

Example 1

Input
arr = [1,2,3]
Output
96
Why
S = 6, P = 6, so 7*6 + 9*6 = 96.

Example 2

Input
arr = [5]
Output
80

Example 3

Input
arr = [0,4,5]
Output
63

Constraints

  • 1 <= arr.length <= 10
  • -20 <= arr[i] <= 20
  • The product fits in 2^53.

Hints

Run checks the 3 visible tests, Submit all 8.