#include <bits/stdc++.h>
using namespace std;
int orientation(long long ax, long long ay, long long bx, long long by,
                long long cx, long long cy) {
  long long val = (by - ay) * (cx - bx) - (bx - ax) * (cy - by);
  if (val == 0) return 0;
  return (val > 0) ? 1 : 2;
}
int main() {
  long long ax, ay, bx, by, cx, cy;
  cin >> ax >> ay >> bx >> by >> cx >> cy;
  if (orientation(ax, ay, bx, by, cx, cy) == 0) {
    printf("No\n");
    return 0;
  }
  unsigned long long dab = (unsigned long long)((ax - bx) * (ax - bx)) +
                           (unsigned long long)((ay - by) * (ay - by));
  unsigned long long dac = (unsigned long long)((ax - cx) * (ax - cx)) +
                           (unsigned long long)((ay - cy) * (ay - cy));
  unsigned long long dbc = (unsigned long long)((cx - bx) * (cx - bx)) +
                           (unsigned long long)((cy - by) * (cy - by));
  if (dab == dbc) {
    printf("Yes\n");
  } else {
    printf("No\n");
  }
  return 0;
}
