Largest 3-Same-Digit Number in String LeetCode Solution

Problem – Largest 3-Same-Digit Number in String LeetCode Solution

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:

  • 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.

Largest 3-Same-Digit Number in String LeetCode Solution in Python

class Solution:
    def largestGoodInteger(self, n: str) -> str:
        return max(n[i-2:i+1] if n[i] == n[i - 1] == n[i - 2] else "" for i in range(2, len(n)))

Largest 3-Same-Digit Number in String LeetCode Solution in C++

string largestGoodInteger(string num) {
    char res = 0;
    for(int i = 2; i < num.size(); ++i)
        if (num[i] == num[i - 1] && num[i] == num[i - 2])
            res = max(res, num[i]);
    return res == 0 ? "" : string(3, res);
}

Largest 3-Same-Digit Number in String LeetCode Solution in Java

class Solution
{
    public String largestGoodInteger(String num)
    {
        String ans = "";
        for(int i = 2; i < num.length(); i++)
            if(num.charAt(i) == num.charAt(i-1) && num.charAt(i-1) == num.charAt(i-2))
                if(num.substring(i-2,i+1).compareTo(ans) > 0) // Check if the new one is larger
                    ans = num.substring(i-2,i+1);
        return ans;
    }
}
Largest 3-Same-Digit Number in String LeetCode Solution Review:

In our experience, we suggest you solve this Largest 3-Same-Digit Number in String and gain some new skills from Professionals completely free and we assure you will be worth it.

If you are stuck anywhere between any coding problem, just visit Queslers to get the Largest 3-Same-Digit Number in String LeetCode Solution

Conclusion:

I hope this Largest 3-Same-Digit Number in String LeetCode Solution would be useful for you to learn something new from this problem. If it helped you then don’t forget to bookmark our site for more Coding Solutions.

This Problem is intended for audiences of all experiences who are interested in learning about Data Science in a business context; there are no prerequisites.

Keep Learning!

More Coding Solutions >>

LeetCode Solutions

Hacker Rank Solutions

CodeChef Solutions

Leave a Reply

Your email address will not be published.