total_operations
to 0
.i
from 0
to k-1
:
a. Extract the subarray consisting of elements arr[i], arr[i+k], arr[i+2k], ...
.
b. Find the LNDS of this subarray.
c. Calculate the number of operations for this subarray as the difference between the subarray's length and the LNDS length.
d. Add the number of operations to total_operations
.total_operations
as the result.