Problem 6
通常第6題會比較難,今年的不一樣?試著解,不對的話請指正。
There are n! different ways to arrange the jumps.
Given a point p between 0 and s = a_1+a_2+...a_n, it
has at most (n-1)! ways to reach. So the total ways to be matched is (n-1)(n-1)! which is less than n!. Also it
means there is at least one way that the grasshopper never lands on any point in M.
There are n! different ways to arrange the jumps.
Given a point p between 0 and s = a_1+a_2+...a_n, it
has at most (n-1)! ways to reach. So the total ways to be matched is (n-1)(n-1)! which is less than n!. Also it
means there is at least one way that the grasshopper never lands on any point in M.