#include <bits/stdc++.h>
using namespace std;
int main(void) {
  double N, R, r, C;
  int n;
  scanf("%d %lf %lf", &n, &R, &r);
  if (R == r)
    N = 1;
  else if (R < r)
    N = 0;
  else if (2 * r > R)
    N = 1;
  else {
    C = asin((double)r / (R - r)) * 360 / 3.14159265758;
    N = 360 / C;
  }
  if (N >= n)
    printf("YES\n");
  else
    printf("NO\n");
  return 0;
}
