Create broken-calculator.cpp

Author: kamyu104

C++/broken-calculator.cpp

@@ -0,0 +1,18 @@
+// Time:  O(logn)
+// Space: O(1)
+
+class Solution {
+public:
+    int brokenCalc(int X, int Y) {
+        int result = 0;
+        while (X < Y) {
+            if (Y % 2) {
+                ++Y;
+            } else {
+                Y /= 2;
+            }
+            ++result;
+        }
+        return result + X - Y;
+    }
+};