struct Result sum_naive(){
        size_t i;
        struct Result res;
        int16_t val;

        gettimeofday(&res.time_start, NULL);
        res.sum = 0;
        for(i = 0; i < SIZE; i++){
                val = data[i] * VOL;
                output[i] = val;
                res.sum += val;
        }
        gettimeofday(&res.time_end, NULL);

        return res;
}