#include <cmath>
#include <cstdio>

typedef struct Point
{
    double x;
    double y;
} point;

double S_count(point a, point b, point c);
double S_count1(point a, point b, point c);

int main(void)
{
    int n;
    scanf("%d", &n);
    point arr[n];
    for (int i = 0; i < n; i++)
        scanf("%lf %lf", &arr[i].x, &arr[i].y);

    double S = 0;
    for (int i = 1; i < n - 1; i++)
    {
        S += S_count(arr[0], arr[i], arr[i + 1]);

    }

    double S1 = 0;
    for (int i = 1; i < n - 1; i++)
    {
        S1 += S_count1(arr[0], arr[i], arr[i + 1]);
    }

    printf("%lf %lf", S, S1);
    return 0;
}

double S_count(point a, point b, point c)
{
    double ab = sqrt((b.x - a.x) * (b.x - a.x) + (b.y - a.y) * (b.y - a.y));
    double bc = sqrt((c.x - b.x) * (c.x - b.x) + (c.y - b.y) * (c.y - b.y));
    double ac = sqrt((c.x - a.x) * (c.x - a.x) + (c.y - a.y) * (c.y - a.y));
    double p = (ab + bc + ac) / 2;

    return sqrt(p * (p - ab) * (p - bc) * (p - ac));
}

double S_count1(point a, point b, point c)
{
    return fabs(((a.x * b.y + a.y * c.x + b.x * c.y) - (a.y * b.x + a.x * c.y + b.y * c.x)) / 2.0);
}