a = 10
b = 20
a = 20
b = 10
The test case is not correct.
I cleaned up the test.
duplicate of 262
swap algorithm without auxiliary variables
Swap the first and last columns
Number of 1s in a binary string
middleAsColumn: Return all but first and last element as a column vector
Multiply a column by a row
Getting the absolute index from a matrix
Find 100 from a Matrix and Replace With 0 with less computation time
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