View Code of Problem 67

#include<stdio.h>
int main()
{
	float a[4],b[4],i=0,t;
	while(scanf("%f%f%f%f",&a[0],&a[1],&a[2],&a[3])!=EOF&&scanf("%f%f%f%f",&b[0],&b[1],&b[2],&b[3])!=EOF)
    {
        if((a[2]-a[0])==0||(b[2]-b[0])==0)
        {
            if((a[2]-a[0])==(b[2]-b[0]))
                printf("No\n");
            else
                printf("Yes\n");
        }
        else if((a[3]-a[1])/(a[2]-a[0])==(b[3]-b[1])/(b[2]-b[0]))
            printf("No\n");
        else
            printf("Yes\n");
    }
	return 0;
}