#include<stdio.h> #include<math.h> #include<string.h> void main() { int a,b,i,j,k1,k2,n,m,sum,x[4],y[4]; while(scanf("%d%d",&x[0],&y[0])!=EOF) { for(i=1;i<4;i++) scanf("%d%d",&x[i],&y[i]); if(x[0]==x[1]&&x[3]==x[2]) { if(x[1]!=x[3]) printf("No\n"); else printf("Yes\n"); } else { k1=(x[0]-x[1])/(y[0]-y[1]); k2=(x[2]-x[3])/(y[2]-y[3]); if(k1==k2&&(y[0]-k1*x[0])!=(y[2]-k2*x[2])) printf("No\n"); else printf("Yes\n"); } } } |
Double click to view unformatted code.