class Solution {
public:

    int rob(vector<int>& nums) {
        int n = nums.size();
        vector<int> f(n,0);
        vector<int> g(n,0);
        for(int i=0;i<n;i++)
        {
            if(i==0)
            {
                f[i] = nums[i];
                g[i] = 0;
            }
            else {
                f[i] = nums[i] + g[i-1];
                g[i] = max(f[i-1],g[i-1]);
            }
            
        }

        return f[n-1]>g[n-1] ? f[n-1] : g[n-1];
    }
};