[1week]Contains Duplicate Sold

Author: Hong-Study

contains-duplicate/Hong-Study.cpp

@@ -0,0 +1,16 @@
+class Solution {
+public:
+    bool containsDuplicate(vector<int>& nums) {
+        std::unordered_map<int, int> map;
+        for(const auto& num: nums){
+            if(map.find(num) != map.end()){
+                return true;
+            }
+
+            map[num] = 1;
+        }
+
+        return false;
+    }
+};
+