View Code of Problem 67

#include<iostream>
using namespace std;
int main()
{
	int x1,x2,x3,x4,y1,y2,y3,y4;
	while(cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4)
	{
		int a=(y2-y1)*(x4-x3);
		int b=(y4-y3)*(x2-x1);
		if(a!=b)
		{
			cout<<"Yes"<<endl;
		}
		else
		{
			cout<<"No"<<endl;
		}
		
	}
	return 0;
}