#include <stdio.h> int main() { double x1, x2, y1, y2, x3, x4, y3, y4; double k1, k2; while(~scanf("%lf%lf%lf%lf", &x1, &y1, &x2,&y2)){ getchar(); scanf("%lf%lf%lf%lf", &x3, &y3, &x4,&y4); if((x2 - x1) && (x4 - x3)){ k1 = (y2-y1) / (x2 - x1); k2 = (y4-y3) / (x4 - x3); if(k1 != k2) printf("Yes\n"); else printf("No\n"); } else if((x2 - x1) || (x4 - x3)) printf("Yes\n"); else printf("No\n"); } return 0; } |
Double click to view unformatted code.