#include <iostream>
#include <cmath>

using namespace std;
int main(){
int a, b, c, d, e, f, xt, yt;
// a, c, e
double AB, BC, AC;
double SABD, SBDC, SADC, SABC; // trikampiu plotai
double AD, DC, DB, BD, DA;
double PADC, PABC, PBDC, PABD, SADC SABC; // pusperimetriai
cout << "iveskite kooridinates a ir b " << endl;
cin >> a >> b;
cout << "Iveskite kooridinates c ir d" << endl;
cin >> c >> d;
cout << "Iveskite kooridinates e ir f" << endl;
cin >> e >> f;
cout << "Iveskite xt ir yt (nutolusius taskus)" << endl;
cin >> xt >> yt;
AB=abs((a-c)^2+(b-d)^2);
BC=abs((c-e)^2+(d-f)^2);
AC=abs((a-e)^2+(b-f)^2);
cout << AB << " " << BC << " " << AC;
PABC=(AB+BC+AC)/2;

SABC=abs(PABC(PABC-AB)+(PABC-BC)+(PABC-AC)); // ABC plotas!!!!

AD=abs((a-xt)^2+(b-yt)^2);
DC=abs((xt-e)^2+(yt-f)^2);
DB=abs((xt-c)^2+(yt-d)^2);

PABD=(AD+DB+AB)/2;
SABD=abs(PABD(PABD-AB)+(PABD-BD)+(PABD-DA)); // ABD plotas

PBDC=(DC+DB+BC)/2;
SBDC=abs(PBDC(PBDC-DC)+(PBDC-DB)+(PBDC-BC)); // BDC plotas

PADC=(AC+AD+DC)/2;
SADC=abs(PADC(PADC-AC)+(PADC-AD)+(PADC-DC)); // ADC plotas
if(SABD+SBDC+SADC=SABC)
    cout << "Taskas yra trikampio virsuneje" << endl;
else
    cout << "Taskas yra trikampio isoreje" << endl;
}