Create stone_wall.rb

Author: rehan-akmal

stone_wall.rb

@@ -0,0 +1,17 @@
+def solution(h)
+  blocks = 0
+  stack = []
+  h.each do |el|
+    while !stack.empty? && stack.last > el do
+      stack.pop()
+    end
+
+    if !stack.empty? && stack.last == el
+    else
+      stack.push(el)
+      blocks += 1
+    end
+
+  end
+  blocks
+end