#include<stdio.h>
#include<math.h>
int main()
{
int x1,y1,x2,y2,x3,y3;
int s1,s2,s3;
scanf("%d%d",&x1,&y1);
scanf("%d %d",&x2,&y2);
scanf("%d%d",&x3,&y3);
if(y1==0&&y2==0&&y3==0)
{
printf("No");
}
else
{
s1 = (int)((x2-x1)/(y2-y1));
s2 = (int)((x3-x1)/(y3-y1));
s3=(x3-x1)/(y3-y1);
if((s1 == s2) && (s2 == s3)&&(s3==s1))
printf("Yes");
else
printf("No");
}
return 0;
}