function maxSubsetSum(arr) {

    /**
     * int incl = 0, excl = 0, temp;
for(int i = 0; i < arr.size(); i++) {
    temp = incl;
    incl = max(arr[i]+excl, temp);
    excl = temp;
}
return max(incl, excl);
     */

    let incl = 0, excl=0, temp;
    for(let i = 0; i< arr.length; i++){
        temp = incl;
        incl= Math.max(arr[i]+excl, temp);
        excl = temp;
    }
    return Math.max(incl, excl);