Perfect Squares 2
Prereq: Knapsack Intro
This problem is similar to Perfect Squares, except a number can only be used once.
Again we ask you to output the minimum number of numbers in order to sum to the desired number.
Output -1
if the number can't be reached.
Examples
Example 1:
Input: 12
Output: -1
Explanation:
You cannot make 12 with any combination of 1, 4, 9
Example 2:
Input: 13
Output: 2
Explanation:
13 = 4 + 9
Try it yourself
Solution
Title
Script
Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem
Ipsum
has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book.
Contrary to popular belief, Lorem
Ipsum
is not simply random text.
1 >>> a = [1, 2, 3] 2 >>> a[-1] 3 3