#include <bits/stdc++.h>
int main() {
  int a, b, c;
  scanf("%d%d%d", &a, &b, &c);
  if (c == 0 && b != a)
    printf("NO\n");
  else if (c == 0 && b == a)
    printf("YES\n");
  else if ((b - a) % c == 0) {
    if ((c > 0 && b >= a) || (c < 0 && b <= a))
      printf("YES\n");
    else
      printf("NO\n");
  } else {
    printf("NO\n");
  }
  return 0;
}
