Given 9 Dots, draw 4 Lines without picking up pen

Problem

Look at the 9 dots in this image. Can you draw 4 straight lines, without picking up your pen, that go through all 9 dots?

Solution

See also

• For a Given node of a binary tree, print the K distance nodes.
• Find the distance between 2 nodes in Binary Tree
• Find the distance between 2 nodes in Binary Tree
• Program to count leaf nodes in a binary tree
• Friend Circle - Hackerrank