dynamic_cast in C++
June 11, 2012Check if a Binary tree is sub-tree of another
June 11, 2012Invert traingle made from 6 circles
Given 6 circles which are arranged in the form of a triangle as shown below
° ° ° ° ° °
You are supposed to invert the triangle and want to move minimum circles. At least how many circles do you need to move to invert the above triangle as below
° ° ° ° ° °
Solution:
You can invert the triangle by moving just 2 circles, as shown below:
