2D Array Middle Point Given dimensions of a 2D array, except 1xn, that results in an odd number of elements, find the midpoint index.
Example: Input is 3x5, representing the 2D array

[0,0] [0,1] [0,2] [0,3] [0,4]
[1,0] [1,1] [1,2] [1,3] [1,4]
[2,0] [2,1] [2,2] [2,3] [2,4]

The midpoint index is [1,2]
Input

3
5

Output

1 , 2

Rules

Standard code-golf rules, fewest bytes wins
Either full program or function is permitted
When input is either 1xn or the corresponding array would have an even number of elements, output must be [0,0]
nx1 should be treated like any other array
APL (Dyalog Classic), 20 19 15 13 bytes



⌊÷∘2×2|×/×1≠⊃


Try it online!