solves #2264: Largest 3-Same-Digit Number in String

 in java

Author: anishLearnsToCode

README.md

@@ -733,7 +733,7 @@
 | 2248 | [Intersection of Multiple Arrays](https://leetcode.com/problems/intersection-of-multiple-arrays)                                                                       |                                                                                [![Java](assets/java.png)](src/IntersectionOfMultipleArrays.java)                                                                                 |                                                                                                                                   |
 | 2255 | [Count Prefixes of a Given String](https://leetcode.com/problems/count-prefixes-of-a-given-string)                                                                     |                                                                                 [![Java](assets/java.png)](src/CountPrefixesOfAGivenString.java)                                                                                 |                                                                                                                                   |
 | 2259 | [Remove Digit From Number to Maximize Result](https://leetcode.com/problems/remove-digit-from-number-to-maximize-result)                                               |                                                                            [![Java](assets/java.png)](src/RemoveDigitFromNumberToMaximizeResult.java)                                                                            |                                                                                                                                   |
-| 2264 | [Largest 3-Same-Digit Number in String](https://leetcode.com/problems/largest-3-same-digit-number-in-string)                                                           |                                                                                                                                                                                                                                  |                                                                                                                                   |
+| 2264 | [Largest 3-Same-Digit Number in String](https://leetcode.com/problems/largest-3-same-digit-number-in-string)                                                           |                                                                                 [![Java](assets/java.png)](src/Largest3SameDigitNumberInString.java)                                                                                 |                                                                                                                                   |
 | 2269 | [Find the K-Beauty of a Number](https://leetcode.com/problems/find-the-k-beauty-of-a-number)                                                                           |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2273 | [Find Resultant Array After Removing Anagrams](https://leetcode.com/problems/find-resultant-array-after-removing-anagrams)                                             |                                                                                                                                                                                                                                  |                                                                                                                                   |
 | 2278 | [Percentage of Letter in String](https://leetcode.com/problems/percentage-of-letter-in-string)                                                                         |                                                                                                                                                                                                                                  |                                                                                                                                   |

src/Largest3SameDigitNumberInString.java

@@ -0,0 +1,25 @@
+// https://leetcode.com/problems/largest-3-same-digit-number-in-string
+// T: O(|s|)
+// S: O(1)
+
+public class Largest3SameDigitNumberInString {
+    public String largestGoodInteger(String num) {
+        char current = num.charAt(0), result = '0' - 1;
+        for (int index = 1, count = 1 ; index < num.length() ; index++) {
+            if (num.charAt(index) == current) {
+                count++;
+            } else {
+                current = num.charAt(index);
+                count = 1;
+            }
+
+            if (count >= 3 && current > result) {
+                result = current;
+            }
+        }
+
+        if (result >= '0') {
+            return (result + "").repeat(3);
+        } else return "";
+    }
+}