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👉🏻按摩师

原题链接：按摩师

mycode:

class Solution {
public:
    int massage(vector<int>& nums) {
        int n = nums.size();
        vector<int> f(n),g(n);
        //考虑越界情况
        if(n==0) return 0;
        //初始化
        f[0] = nums[0],g[0] = 0;
        for(int i = 1;i<n;i++)
        {
            f[i] = g[i-1]+nums[i];
            g[i] = max(f[i-1],g[i-1]);
        }
        return max(f[n-1],g[n-1]);
    }
};

👉🏻打家劫舍I

原题链接：打家劫舍I

mycode:

class Solution {
public:
    int rob(vector<int>& nums) {
        int n = nums.size();
        vector<int> f(n),g(n);//偷或不偷两种状态
        //初始化
        f[0] = nums[0],g[0] = 0;
        for(int i = 1;i<n;i++)
        {
            f[i] = g[i-1]+nums[i];
            g[i] = max(f[i-1],g[i-1]);
        }
        return max(f[n-1],g[n-1]);
    }
};

👉🏻打家劫舍II

原题链接：打家劫舍II

mycode:

class Solution {
public:
    int rob1(vector<int>& nums,int left,int right)
    {
        if(left>right) return 0;
         int n = nums.size();
        vector<int> f(n),g(n);
         f[left] = nums[left];
        for(int i = left+1;i<=right;i++)
        {
            f[i] = g[i-1]+nums[i];
            g[i] = max(f[i-1],g[i-1]);
        }
        return max(f[right],g[right]);

    }
    int rob(vector<int>& nums) {
         int n = nums.size();

        return max(nums[0]+rob1(nums,2,n-2),rob1(nums,1,n-1));
    }
};