diff --git a/2018/AnatoliDobshikov/1/pascals_triangle.rb b/2018/AnatoliDobshikov/1/pascals_triangle.rb
new file mode 100644
index 000000000..1019541c8
--- /dev/null
+++ b/2018/AnatoliDobshikov/1/pascals_triangle.rb
@@ -0,0 +1,24 @@
+# Program draws pascal's triangle with the specified depth in the console
+# values input
+print 'Input tree depth: '
+tree_depth = gets.chomp.to_i
+print 'Input base number: '
+base_number = gets.chomp.to_i
+# checking values
+if tree_depth <= 0 || base_number <= 0
+  puts 'Invalid value. Try to type positive integer.'
+  exit
+end
+# tree create
+NUM_LENGTH = 4 # the maximal length in the triangle
+coef = [base_number]
+console_cols = `/usr/bin/tput cols`.chomp.to_i - 4 # fix trailing blank line
+spaces = ' ' * (tree_depth / NUM_LENGTH > 0 ? tree_depth / NUM_LENGTH : 1)
+tree_depth.times do |level|
+  printf('%03d:', level)
+  puts coef.join(spaces).center(console_cols)
+  coef.push(0)
+  (level + 1).downto(1) do |column|
+    coef[column] += coef[column - 1]
+  end
+end