class Solution {
public:
int rob(vector<int>& nums) {
int n = nums.size();
vector<int> f(n,0);
vector<int> g(n,0);
f[0] = nums[0];
for(int i=1;i<n;i++)
{
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];
}
};

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