This question already has answers here: Closed 11 years ago. Possible Duplicates: nth ugly number Find the Kth least number for expression (2^x)*(3^y)*(5^z)
In the expression 2x * 3y * 5z The x, y and z can take non negativ开发者_Python百科e integer value (>=0).
Numbers whose only prime factors are 2, 3, or 5 are called ugly numbers. Example: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, ...
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