#include <bits/stdc++.h>
#define x first
#define y second

using namespace std;

void sayNo(int n){
    for (int i=0;i<n;i++){
        cout << "NO" << endl;
    }
}
float kos_pr(pair<float,float> p1, pair<float, float> p2, pair<float, float> p3){
    pair<float, float> v1;
    pair<float, float> v2;
    v1.x = p2.x-p1.x;
    v1.y = p2.y-p1.y;
    v2.x = p3.x-p1.x;
    v2.y = p3.y-p1.y;
    return v1.x*v2.y - v1.y*v2.x;
}
float sc_pr(pair<float,float> p1, pair<float, float> p2, pair<float, float> p3){
    pair<float, float> v1;
    pair<float, float> v2;
    v1.x = p2.x-p1.x;
    v1.y = p2.y-p1.y;
    v2.x = p3.x-p1.x;
    v2.y = p3.y-p1.y;
    return v1.x*v2.x + v1.y*v2.y;
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    float k,b;
    pair<float, float> points[3];
    for (int i=0;i<3;i++){
        cin >> points[i].x;
        cin >> points[i].y;
    }
    k = (points[1].y - points[2].y)/(points[1].x - points[2].x);
    b = points[2].y - k * points[2].x;

    if (kos_pr(points[0],points[1],points[2])==0){
        cout << "YES" << endl;
        if (sc_pr(points[1], points[2], points[0]) >=0){
            cout << "YES" << endl;
            if (sc_pr(points[0], points[1], points[2]) <= 0){
                cout << "YES";
            }else{
                cout << "NO";
            }
        } else{
            sayNo(2);
        }
    }else{
        sayNo(3);
    }
    return 0;
}