Package g1001_1100.s1015_smallest_integer_divisible_by_k

Class Solution

  • All Implemented Interfaces:
    
public final class Solution

    1015 - Smallest Integer Divisible by K.

    Medium

    Given a positive integer k, you need to find the length of the smallest positive integer n such that n is divisible by k, and n only contains the digit 1.

    Return the length of n. If there is no such n, return -1.

    Note: n may not fit in a 64-bit signed integer.

    Example 1:

    Input: k = 1

    Output: 1

    Explanation: The smallest answer is n = 1, which has length 1.

    Example 2:

    Input: k = 2

    Output: -1

    Explanation: There is no such positive integer n divisible by 2.

    Example 3:

    Input: k = 3

    Output: 3

    Explanation: The smallest answer is n = 111, which has length 3.

    Constraints:

    • <code>1 <= k <= 10<sup>5</sup></code>

    • Nested Class Summary

      Nested Classes 
      Modifier and Type Class Description

    • Field Summary

      Fields 
      Modifier and Type Field Description

    • Constructor Summary

      Constructors 
      Constructor Description
      Solution()

    • Enum Constant Summary

      Enum Constants 
      Enum Constant Description

    • Method Summary

      Modifier and Type Method Description
      final Integer smallestRepunitDivByK(Integer k)

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait