def maxSubsetSum(arr):
        n = len(arr)
        if(n==0): return 0
        if(n==1): return arr[0]
        if(n==2): return max(arr[0],arr[1])
        dp1 = 0
        dp2 = 0
        for num in arr:
                temp = max(dp1+num, dp2)
                dp1 = dp2
    dp2 = temp
return dp2