View Code of Problem 67

#include <bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c,d;
	while(cin>>a>>b>>c>>d){
		int e,f,g,h;
		double k1,k2;
		cin>>e>>f>>g>>h;
		if(a==c) k1=99999;
		else k1=1.0*(c-a)/(d-b); 
		if(e==f) k2=99999;
		else k2=1.0*(g-e)/(h-f);
		if(k1!=k2) cout<<"Yes"<<endl;
		else cout<<"No"<<endl;
	}
}