Question 6
Six coin stacks contain 1,6,4,2,5,3 coins from left to right.
A press of A,B,C,D or E compares the adjacent stacks on its two sides. If the left stack is smaller, swap them; if the right stack is smaller, leave them unchanged. What is the fewest button presses needed to put the stacks in decreasing order?
A press of A,B,C,D or E compares the adjacent stacks on its two sides. If the left stack is smaller, swap them; if the right stack is smaller, leave them unchanged. What is the fewest button presses needed to put the stacks in decreasing order?