A vampire number is a number v that is the product of two numbers x and y such that the following conditions are satisfied:
- at most one of x and y are divisible by 10;
- x and y have the same number of digits; and
- The digits in v consist of the digits of x and y (including anyrepetitions).
If these conditions are met, x and y are known as "fangs" of v. For example, 1260 is a vampire number because 1260 = 21*60, so 21 and 60 are the fangs.
Write a function that returns all the vampire numbers in a given array. The output is a vector.
Example: disp(find_vampire(1000:2000) 1260 1395 1435 1530 1827
Solution Stats
Problem Comments
5 Comments
Solution Comments
Show comments
Loading...
Problem Recent Solvers397
Suggested Problems
-
Sort a list of complex numbers based on far they are from the origin.
5806 Solvers
-
Find the two most distant points
2955 Solvers
-
Replace NaNs with the number that appears to its left in the row.
3067 Solvers
-
Implement simple rotation cypher
1096 Solvers
-
5312 Solvers
More from this Author9
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Are you sure about the first rule? It doesn't seem necessary according to https://oeis.org/A014575.
The problem is really fun.
fun
interesting problem ...
bài này dễ vl:))