string balancedSums(vector<int> arr) {
    if(arr.size() == 1){
        return "YES";
    }
    else{
        long sum = 0;
        for(auto num: arr){
            sum += num;
        }

        if((sum - arr[0]) == 0){
            return "YES";
        }

        long sumLeft = 0;
        for(size_t split = 1; split < arr.size(); split++){
            sumLeft += arr[split-1];
            long sumRight = sum-sumLeft-arr[split];

            if(sumLeft == sumRight){
                return "YES";
            }
        }
    }

    return "NO";
}