For this case, a number is defined ugly if it has prime factors consisting of only elements of x.
Find the nth ugly number.
so the ans is 15.
Unlike the previous two "ugly()" problems, in this one it appears that the number "1" is not considered ugly.
Most nonzero elements in row
Arrange Vector in descending order
Is it an Armstrong number?
Recaman Sequence - I
3rd side of a Triangle
Hanging cable - 01
Ugly numbers - 01
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