#include "mylib.h"
#include <cassert>       // assert()
#include <cmath>
#include <vector>

using namespace std;

long double Kahan_skalar(vector<double> const &input)
{
    long double sum = 0.0;
    long double c = 0.0;

    for (long unsigned int i=0; i<input.size(); i++){
        long double y = input[i] - c;
        long double t = sum + y;
        c = (t-sum) - y;
        sum = t;
    }
    return sum;
}

long double normal_sum(vector<double> const &input)
{
    long double sum = 0.0;
    for (long unsigned int i=0; i<input.size(); i++){
        sum += input[i];
    }
    return sum;
}