add 2729

Author: fishercoder1534

Diff for: paginated_contents/algorithms/3rd_thousand/README.md

@@ -17,6 +17,7 @@
 | 2744 | [Find Maximum Number of String Pairs](https://leetcode.com/problems/find-maximum-number-of-string-pairs/)                                                                                                             | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2744.java)                                       |  | Easy                           |
 | 2739 | [Total Distance Traveled](https://leetcode.com/problems/total-distance-traveled/)                                                                                                             | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2739.java)                                       |  | Easy                           |
 | 2733 | [Neither Minimum nor Maximum](https://leetcode.com/problems/neither-minimum-nor-maximum/)                                                                                                             | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2733.java)                                       |  | Easy                           |
+| 2729 | [Check if The Number is Fascinating](https://leetcode.com/problems/check-if-the-number-is-fascinating/)                                                                                                             | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2729.java)                                       | | Easy                           |
 | 2716 | [Minimize String Length](https://leetcode.com/problems/minimize-string-length/)                                                                                                             | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2716.java)                                       | [:tv:](https://youtu.be/aMJ3T0K8LjI) | Easy                           |
 | 2710 | [Remove Trailing Zeros From a String](https://leetcode.com/problems/remove-trailing-zeros-from-a-string/)                                                                                   | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2710.java)                                       |                                 | Easy                           |
 | 2706 | [Buy Two Chocolates](https://leetcode.com/problems/buy-two-chocolates/)                                                                                                                     | [Java](https://github.com/fishercoder1534/Leetcode/blob/master/src/main/java/com/fishercoder/solutions/thirdthousand/_2706.java)                                       |                                 | Easy                           |

Diff for: src/main/java/com/fishercoder/solutions/thirdthousand/_2729.java

@@ -0,0 +1,23 @@
+package com.fishercoder.solutions.thirdthousand;
+
+import java.util.HashSet;
+import java.util.Set;
+
+public class _2729 {
+    public static class Solution1 {
+        public boolean isFascinating(int n) {
+            StringBuilder sb = new StringBuilder();
+            sb.append(n);
+            sb.append(n * 2);
+            sb.append(n * 3);
+            String num = sb.toString();
+            Set<Integer> set = new HashSet<>();
+            for (int i = 0; i < num.length(); i++) {
+                if (num.charAt(i) == '0' || !set.add(Integer.parseInt(num.charAt(i) + ""))) {
+                    return false;
+                }
+            }
+            return set.size() == 9;
+        }
+    }
+}

Diff for: src/test/java/com/fishercoder/thirdthousand/_2729Test.java

@@ -0,0 +1,22 @@
+package com.fishercoder.thirdthousand;
+
+import com.fishercoder.solutions.thirdthousand._2729;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+public class _2729Test {
+    private static _2729.Solution1 solution1;
+
+    @BeforeEach
+    public void setup() {
+        solution1 = new _2729.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        assertTrue(solution1.isFascinating(192));
+    }
+
+}