Date: Thu, 30 Apr 1998 07:53:48 -0400
From: Alex Bogomolny
Tim:
First, convince yourself that it takes exactly 5 bridge traversals to move 4 people from one side to another.
Second, there is only one way to represent 17 as the sum of 5 integers drawn from among 1,2,5,10: 17=10+2+2+2+1.
Solution 1:
1,2,5,10 -
5,10 -> 1,2 (2)
2,5,10 <- 1 (2)
2 -> 1,5,10 (10)
1,2 <- 5,10 (1)
-> 1,2,5,10 (2)
Solution 2
1,2,5,10 -
5,10 -> 1,2 (2)
1,5,10 <- 2 (1)
1 -> 2,5,10 (10)
1,2 <- 5,10 (2)
-> 1,2,5,10 (2)
Are the notations clear?
Regards,
Alexander Bogomolny
71545679