Update bulb-switcher.cpp

WenjinSun · Dec 20, 2015 · c881989 · c881989
1 parent 215277e
commit c881989
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/C++/bulb-switcher.cpp b/C++/bulb-switcher.cpp
@@ -4,6 +4,7 @@
 class Solution {
 public:
     int bulbSwitch(int n) {
+        // The number of full squares.
         return static_cast<int>(sqrt(n));
     }
 };