#include <iostream>
#include <vector>
#include <string>
#include <iomanip>
#include <queue>
#include <cmath>
#include <algorithm>
#include <unordered_map>
#include <tuple>
#include <iomanip>
#include <stdio.h>
#include <map>
#include <bitset>
#include <set>
#include <stack>
#include <queue>
#include <unordered_set>
#include <cassert>
#include <stdlib.h>
#include <time.h>
#include <random>


//#pragma GCC optimize("Ofast,no-stack-protector")
//#pragma GCC target("sse,sse2,sse3,sse3,sse4")
//#pragma GCC optimize("unroll-loops")
//#pragma GCC optimize("fast-math")
//#pragma GCC target("avx2")
//#pragma GCC optimize("section-anchors")
//#pragma GCC optimize("profile-values,profile-reorder-functions,tracer")
//#pragma GCC optimize("vpt")
//#pragma GCC optimize("rename-registers")
//#pragma GCC optimize("move-loop-invariants")
//#pragma GCC optimize("unswitch-loops")
//#pragma GCC optimize("function-sections")
//#pragma GCC optimize("data-sections")

#define int long long
#define ll long long
#define ull unsigned long long
#define all(a) (a).begin(), (a).end()
#define pii pair<int, int>
#define pb push_back
#define ld long double


using namespace std;

//const int INF = 1e17;
//const int mod = 2600000069;
//const int p = 179;
const ld PI = 3.141592653589793238463;

struct Point {
    int x, y;
    Point() {}
    Point(int x_, int y_) {
        x = x_;
        y = y_;
    }
};

istream& operator >> (istream& in, Point& a) {
    return in >> a.x >> a.y;
}

ostream& operator << (ostream& out, Point& a) {
    return out << a.x << " " << a.y;
}

Point operator-(Point& a, Point& b) {
    return Point(a.x - b.x, a.y - b.y);
}

void operator-=(Point& a, Point& b) {
    a = a - b;
}

void operator*=(Point& a, int k) {
    a.x *= k;
    a.x *= k;
}

int operator%(Point a, Point b) { //scalar
    return a.x * b.x + a.y * b.y;
}

bool operator*(Point a, Point b) { //vec
    return (a.x * b.y - a.y * b.x) >= 0;
}

ld angle(Point a, Point b) {
    return abs(atan2(a * b, a % b)) * (360.0/PI);
}

signed main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    Point a, o, c, p;
    cin >> a >> o >> c >> p;
    a -= o;
    c -= o;
    p -= o;
    o = Point(0, 0);
    if (a * p == p * c && a * p == a * c) cout << "YES\n";
    else cout << "NO\n";
}
/*
0 0
3 0
0 4
*/