int sum_up(int* arr, int l, int r){
    int res = 0;
    for (int i = l; i<= r; i++){
        res += arr[i];
    }
    return res;
}

char* balancedSums(int arr_count, int* arr){
    int total_sum = sum_up(arr, 0, arr_count-1);
    int left_sum = 0;
    int right_sum;
    for (int i=0; i<arr_count; i++){
        right_sum = total_sum - left_sum - arr[i];
        if (left_sum == right_sum){
            return "YES";
        }
        left_sum += arr[i];
    }    
    return "NO";
}