FEAT : upload #217

Author: yeonsu-ju

contains-duplicate/crumbs22.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+#include <vector>
+#include <unordered_set>
+
+using namespace std;
+
+class Solution {
+public:
+    bool containsDuplicate(vector<int>& nums) {
+		unordered_set<int> uset(nums.begin(), nums.end());
+		return (nums.size() != uset.size());
+    }
+};