Create count-odd-numbers-in-an-interval-range.cpp

Author: kamyu104

C++/count-odd-numbers-in-an-interval-range.cpp

@@ -0,0 +1,9 @@
+// Time:  O(n)
+// Space: O(1)
+
+class Solution {
+public:
+    int countOdds(int low, int high) {
+        return (high + 1) / 2 - ((low - 1) + 1) / 2;
+    }
+};