#include <bits/stdc++.h> using namespace std; int main() { int x1,x2,y1,y2; while(cin>>x1>>y1>>x2>>y2) { int xx1,xx2,yy1,yy2; cin>>xx1>>yy1>>xx2>>yy2; if(x1==x2) { if(xx2==xx1) cout<<"No"<<endl; else cout<<"Yes"<<endl; } else if(y1==y2) { if(yy2==yy1) cout<<"No"<<endl; else cout<<"Yes"<<endl; } else { double k1=(y1-y2)/(x1-x2); if(yy1==yy2||xx1==xx2) cout<<"Yes"<<endl; else { double k2=(yy1-yy2)/(xx1-xx2); if(k1==k2) cout<<"No"<<endl; else cout<<"Yes"<<endl; } } } return 0; } |
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