Create passing_cars.rb

Author: rehan-akmal

passing_cars.rb

@@ -0,0 +1,14 @@
+def solution(a)
+  counter = 0
+  zero_counter = 0
+  
+  a.each_with_index do |element, index|
+    if element == 0
+      zero_counter += 1
+    else
+      counter += zero_counter
+      return -1 if counter == 1000000000
+     end
+  end
+  counter
+end