#include <bits/stdc++.h>
using namespace std;

int main(){
  int x0,y0,x1,y1,x2; cin >> x0 >> y0 >> x1 >> y1 >> x2;
  cout << (sqrt(x0*x0+y0*y0)*sqrt((x2-x0)*(x2-x0)+y0*y0)==sqrt(x1*x1+y1*y1)*sqrt((x2-x1)*(x2-x1)+y1*y1)?"Yes":"No") << endl;
}