Create card-flipping-game.cpp

Author: kamyu104

C++/card-flipping-game.cpp

@@ -0,0 +1,26 @@
+// Time:  O(n)
+// Space: O(n)
+
+class Solution {
+public:
+    int flipgame(vector<int>& fronts, vector<int>& backs) {
+        unordered_set<int> same;
+        for (int i = 0; i < fronts.size(); ++i) {
+            if (fronts[i] == backs[i]) {
+                same.emplace(fronts[i]);
+            }
+        }
+        int result = numeric_limits<int>::max();
+        for (const auto& n : fronts) {
+            if (!same.count(n)) {
+                result = min(result, n);
+            }
+        }
+        for (const auto& n : backs) {
+            if (!same.count(n)) {
+                result = min(result, n);
+            }
+        }
+        return result != numeric_limits<int>::max() ? result : 0;
+    }
+};