Given a input vector x, return y as index-powered vector as shown below.
x = [2 3 6 9]
then y should be
[2^1 3^2 6^3 9^4] = [2 9 216 6561]
Determine whether a vector is monotonically increasing
Right and wrong
vectorization in N
subtract central cross
Concatenate two strings
Find my birthday
Matrix multiplication across rows
Create a v-notch vector without "sort" function
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