add 1805

fishercoder1534 · fishercoder1534 · commit 5c67f83c42c7 · 2021-03-28T10:21:16.000-07:00
diff --git a/README.md b/README.md
@@ -8,6 +8,7 @@ _If you like this project, please leave me a star._ &#9733;
 
 |  #  |      Title     |   Solutions   | Video  | Difficulty  | Tag                   
 |-----|----------------|---------------|--------|-------------|-------------
+|1805|[Number of Different Integers in a String](https://leetcode.com/problems/number-of-different-integers-in-a-string/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1805.java) ||Medium|String|
 |1800|[Maximum Ascending Subarray Sum](https://leetcode.com/problems/maximum-ascending-subarray-sum/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1800.java) ||Easy|Two Pointers|
 |1797|[Design Authentication Manager](https://leetcode.com/problems/design-authentication-manager/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1797.java) ||Medium|HashTable, Design|
 |1796|[Second Largest Digit in a String](https://leetcode.com/problems/second-largest-digit-in-a-string/)|[Solution](../master/src/main/java/com/fishercoder/solutions/_1796.java) ||Easy|String|
diff --git a/src/main/java/com/fishercoder/solutions/_1805.java b/src/main/java/com/fishercoder/solutions/_1805.java
@@ -0,0 +1,27 @@
+package com.fishercoder.solutions;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class _1805 {
+    public static class Solution1 {
+        public int numDifferentIntegers(String word) {
+            StringBuilder sb = new StringBuilder();
+            for (int i = 0; i < word.length(); i++) {
+                if (!Character.isDigit(word.charAt(i))) {
+                    sb.append(" ");
+                } else {
+                    sb.append(word.charAt(i));
+                }
+            }
+            String[] numbers = sb.toString().split("\\s+");
+            Set<String> set = new HashSet<>();
+            for (String num : numbers) {
+                if (!num.isEmpty()) {
+                    set.add(num.replaceFirst("^0+(?!$)", ""));
+                }
+            }
+            return set.size();
+        }
+    }
+}
