#include<iostream> using namespace std; int main(){ int x1,y1,x2,y2,x3,y3,x4,y4; while(cin>>x1>>y1>>x2>>y2>>x3>>y3>>x4>>y4){ int k1=(y2-y1)*(x4-x3); int k2= (y4-y3)/(x2-x1); int k3=(y4-y1)*(x2-x3); int k4=(y2-y3)*(x4-x1); if(k1==k2 && k3!=k4){ printf("No"); cout<<"\n"; } else{ printf("Yes"); cout<<"\n"; } } } |
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