Leetcode - Perfect Squares
https://leetcode.com/problems/perfect-squares/
Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ...) which sum to n.
Example 1:
Input: n =12Output: 3 Explanation:12 = 4 + 4 + 4.
Example 2:
Input: n =13Output: 2 Explanation:13 = 4 + 9.
func numSquares(n int) int {
if n == 0 {
return 0
}
dp := make([]int, n+1)
for i := 1; i <= n; i++ {
dp[i] = math.MaxInt32
}
for i := 1; i <= n; i++ {
for j := 1; j*j <= i; j++ {
dp[i] = min(dp[i], dp[i-j*j]+1)
}
}
return dp[n]
}
func min(a, b int) int {
if a < b {
return a
}
return b
}
Aug 07, 2022 04:44:24 PM
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