Create alice-and-bob-playing-flower-game.cpp

Author: kamyu104

C++/alice-and-bob-playing-flower-game.cpp

@@ -0,0 +1,10 @@
+// Time:  O(1)
+// Space: O(1)
+
+// combinatorics
+class Solution {
+public:
+    long long flowerGame(int n, int m) {
+        return (1ll * n * m) / 2;
+    }
+};