Create bulb-switcher-iii.cpp

Author: kamyu104

C++/bulb-switcher-iii.cpp

@@ -0,0 +1,14 @@
+// Time:  O(n)
+// Space: O(1)
+
+class Solution {
+public:
+    int numTimesAllBlue(vector<int>& light) {
+        int result = 0, right = 0;
+        for (int i = 0; i < light.size(); ++i) {
+            right = max(right, light[i]);
+            result += (i + 1 == right);
+        }
+        return result;
+    }
+};