Write a program to find the n
-th ugly number.
Ugly numbers are positive numbers whose prime factors only include 2, 3, 5
.
Example:
Input: n = 10 Output: 12 Explanation:1, 2, 3, 4, 5, 6, 8, 9, 10, 12
is the sequence of the first10
ugly numbers.
Note:
1
is typically treated as an ugly number.n
does not exceed 1690.
方法1:
public class Leetcode_264_UglyNumberII {
public static void main(String[] args) {
Leetcode_264_UglyNumberII leetcode_264_uglyNumb