x1,y1,x2,y2,x3=list(map(int,input().split()))
def resolve(x1,y1,x2,y2):
    return 1/2*(abs(x1*y2-x2*y1))
oac,obc=resolve(x1,y1,x3,0),resolve(x2,y2,x3,0)
if oac==obc:
    print("Yes")
else:
    print("No")