LC_217 is in python changed to cpp

Leetcode_Practice_Questions/LC_217.cpp

@@ -1,5 +1,32 @@
-def containsDuplicate(self, nums: List[int]) -> bool:
-if (len(set(nums))) == len(nums):
-    return False
-else: 
-    return True
+#include <iostream>
+#include <vector>
+#include <set>
+using namespace std;
+
+class Solution {
+public:
+    bool containsDuplicate(vector<int>& nums) {
+        set<int> result;
+        for (int i = 0; i < nums.size(); i++) {
+            result.insert(nums[i]);
+        }
+        if (result.size() < nums.size()) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+};
+
+int main() {
+    Solution obj;
+    vector<int> nums = {1, 2, 3, 1};  // Example input
+
+    if (obj.containsDuplicate(nums)) {
+        cout << "Contains duplicate elements." << endl;
+    } else {
+        cout << "No duplicates found." << endl;
+    }
+
+    return 0;
+}