dp3-likou-java

 

class Solution {
    public int integerBreak(int n) {
        int []dp=new int[n+1];//dp[i]是分解i得到的最大乘积
        dp[2]=1;
        for(int i=3;i<=n;i++){
            for(int j=1;j<=i-1;j++){
                dp[i]=Math.max(dp[i],Math.max(j*dp[i-j],j*(i-j)));
            }
        }
        return dp[n];
    }
}
//https://leetcode-cn.com/problems/integer-break/solution/bao-li-sou-suo-ji-yi-hua-sou-suo-dong-tai-gui-hua-/

class Solution {
    public int numSquares(int n) {
        int []dp=new int[n+1];
        Arrays.fill(dp,Integer.MAX_VALUE);
        dp[0]=0;
        for(int i=1;i<=n;i++){
            for(int j=1;j*j<=i;j++){
                dp[i]=Math.min(dp[i],dp[i-j*j]+1);
            }
        }
        return dp[n];
    }
}