#1502Medium· asked at 8 companies
Perfect Squares
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What we know
Example 1
Input: n = 12 Output: 3
12 = 4 + 4 + 4.
Example 2
Input: n = 13 Output: 2
13 = 4 + 9.
Constraints
- •
1 <= n <= 10^4 - •
The answer is at most 4 by Lagrange's four-square theorem.