View Code of Problem 67

#include <iostream>
#include <sstream>
#include <stdio.h>
#include <string>
#include <math.h>
#include <algorithm>
#include <stdlib.h>
#include <stack>
#include <map>
#include <set>
#include <queue>
using namespace std;
int change(int a,int b,int c)
{
    return a*3600+b*60+c;
}

int main()
    {
        #ifdef  ONLINE_JUDGE
        #else
        freopen("1.txt","r",stdin);
        #endif
int a,b,c,d;
	int e,f,g,h;
	double k1,k2;
	while( scanf("%d%d%d%d%d%d%d%d",&a,&b,&c,&d,&e,&f,&g,&h))
	{
		if( a!=c && e!=g )
		{
			k1 = 1.0*(d-b)/(c-a);
			k2 = 1.0*(h-f)/(g-e);
			if(k1 == k2)
			{
				if(b-a*k1==f-e*k2)
				printf("Yes\n");
				else
				printf("No\n");
			}
			else
			{
				printf("Yes\n");
			}
		}
	  else if(a==c&&e==g)
		{
			if(a==e)
			 printf("Yes\n");
			else
			  printf("No\n");
		 }
	 else
		 {
		 	printf("Yes\n");
		 }
	}
	return 0;

    }