#include<bits/stdc++.h>
using namespace std;
using ll=long long;
using ld=long double;

int main(){
  ld x1,y1,x2,y2,x3;
  cin>>x1>>y1>>x2>>y2>>x3;
  ld s1=abs((-x3*y2)/2.0);
  ld s2=abs((-x3*y1)/2.0);
  if(s1==s2){
    cout<<"Yes"<<endl;
  }else{
    cout<<"No"<<endl;
  }
}