0279. Perfect Squares
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https://leetcode.com/problems/perfect-squares
Given an integer n
, return the least number of perfect square numbers that sum to n
.
A perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself. For example, 1
, 4
, 9
, and 16
are perfect squares while 3
and 11
are not.
Example 1:
Example 2:
Constraints:
1 <= n <= 104
)
time limit exceed layer -> need to have int size = q.size();