View Code of Problem 67

#include <iostream>
#include <cstdio>
using namespace std;
int main(){
    int x1,y1,x2,y2,x3,y3,x4,y4,k1,k2;
    while(cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4){
        k1=(y2-y1)/(x2-x1);
        k2=(y4-y3)/(x4-x3);
        if(k1%k2==0||k1==k2)
            cout<<"No"<<endl;
        else
            cout<<"Yes"<<endl;
    }
    return 0;
}

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