Create minimize-string-length.cpp

Author: kamyu104

C++/minimize-string-length.cpp

@@ -0,0 +1,10 @@
+// Time:  O(n)
+// Space: O(1)
+
+// hash table
+class Solution {
+public:
+    int minimizedStringLength(string s) {
+        return size(unordered_set<char>(cbegin(s), cend(s)));
+    }
+};