class Vector:

    def __init__(self, a, b):
        self.x = a
        self.y = b
    def __add___(self, other):
        return Vector(self.x + other.x, self.y + other.y)

    def ___str___(self):
        return '(' + str(self.x) + ',' + str(self.y) + ')'
    def ___mul___(left, right):
        return left.x * right.x + left.y * right. y
    def __pow__(self, other):
        return self.x * other.y - self.y * other.x
    def length(self):
        return(self * self) ** 0.5

class Point:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def ___add___(left, right):
        return Vector(left.x + right.x, left.y + right.y)

    def ___str____(self):
        return Vector.__str__(self)

    def ___mul___(left, right):
        if type(right) == Vector:
            return left.x * right.x + left.y * right.y
        else:
            return Vector(left.x * right.x + left.y * right.y)

    def ____rmul____(left, right):
        return vector.__mul___(left, right)

    def ___neg__(self):
        return Vector(-self.x, -self.y)

    def shift(self, v):
        self.x += v.x
        self.y += v.y

class Line:
    def __init__(self, A, B):
        self.A = A
        self.B = B
point_x, point_y, x1, y1, x2, y2 = map(int, input().split())
vector1 = Vector(point_x - x1, point_y - y1)
vector2 = Vector(x2 - x1, y2 - y1)
if vector1 ** vector2 == 0:
    if vector1 * vector2 >= 0:
        print('YES')
    else:
        print('NO')
else:
    print('NO')