Package g2201_2300.s2264_largest_3_same_digit_number_in_string

Class Solution

java.lang.Object
g2201_2300.s2264_largest_3_same_digit_number_in_string.Solution
public class Solution extends java.lang.Object
2264 - Largest 3-Same-Digit Number in String.

Easy

You are given a string num representing a large integer. An integer is good if it meets the following conditions:

  • It is a substring of num with length 3.
  • It consists of only one unique digit.

Return the maximum good integer as a string or an empty string "" if no such integer exists.

Note:

  • A substring is a contiguous sequence of characters within a string.
  • There may be leading zeroes in num or a good integer.

Example 1:

Input: num = “6777133339”

Output: “777”

Explanation: There are two distinct good integers: “777” and “333”.

“777” is the largest, so we return “777”.

Example 2:

Input: num = “2300019”

Output: “000”

Explanation: “000” is the only good integer.

Example 3:

Input: num = “42352338”

Output: ""

Explanation: No substring of length 3 consists of only one unique digit. Therefore, there are no good integers.

Constraints:

  • 3 <= num.length <= 1000
  • num only consists of digits.

  • Constructor Summary

    Constructors
    Constructor
    Description
    Solution()
     

  • Method Summary

    Modifier and Type
    Method
    Description
    java.lang.String
    largestGoodInteger(java.lang.String num)
     

    Methods inherited from class java.lang.Object

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

  • Constructor Details

    • Solution

      public Solution()

  • Method Details

    • largestGoodInteger

      public java.lang.String largestGoodInteger(java.lang.String num)