#include <bits/stdc++.h>
int main() {
  int n, flag = 0;
  double r, R;
  scanf("%d%lf%lf", &n, &R, &r);
  if (n <= 2) {
    if ((double)n * r <= (R + 1e-8)) flag = 1;
  } else {
    if ((double)n * asin(r / (R - r)) <= (3.141592653589793238462643 + 1e-8))
      flag = 1;
  }
  if (flag)
    printf("YES\n");
  else
    printf("NO\n");
  return 0;
}
