array

Author: Simcoderan

Easy217.java

@@ -0,0 +1,25 @@
+//CONTAINS DUPLICATE
+import java.util.HashSet;
+    import java.util.Set;
+    
+    public class Easy217 {
+        public boolean containsDuplicate(int[] nums) {
+            // Create a HashSet to store visited elements
+            Set<Integer> visited = new HashSet<>();
+    
+            // Iterate over the array
+            for (int i = 0; i < nums.length; i++) {
+                // If the element is already in the set, return true
+                if (visited.contains(nums[i])) {
+                    return true;
+                } 
+                // Otherwise, add the element to the set
+                else {
+                    visited.add(nums[i]);
+                }
+            }
+            // If no duplicates are found, return false
+            return false;
+        }
+    }
+