Write a program to find the n-th ugly number.
Ugly numbers are positive integers which are divisible by a or b or c.
Example 1:
Input: n = 3, a = 2, b = 3, c = 5 Output: 4 Explanation: The ugly numbers are 2, 3, 4, 5, 6, 8, 9, 10... The 3rd is 4.
Example 2:
Input: n = 4, a = 2, b = 3, c = 4 Output: 6 Explanation: The ugly numbers are 2, 3, 4, 6, 8, 9, 10, 12... The 4th is 6.
Example 3:
Input: n = 5, a = 2, b = 11, c = 13 Output: 10 Explanation: The ugly numbers are 2, 4, 6, 8, 10, 11, 12, 13... The 5th is 10.
Example 4:
Input: n = 1000000000, a = 2, b = 217983653, c = 336916467 Output: 1999999984
Constraints:
1 <= n, a, b, c <= 10^91 <= a * b * c <= 10^18- It's guaranteed that the result will be in range
[1, 2 * 10^9]