#include <bits/stdc++.h>
int main() {
  double a, b, c;
  while (~scanf("%lf%lf%lf", &a, &b, &c)) {
    if (b == c) {
      if (a == 1)
        printf("YES\n");
      else
        printf("NO\n");
    } else if (c > b)
      printf("NO\n");
    else {
      if (a == 1)
        printf("YES\n");
      else {
        double check = a * acos((2.0 * (b - c) * (b - c) - 4.0 * c * c) /
                                (2.0 * (b - c) * (b - c)));
        if (check < 2.0 * 3.14159265359)
          printf("YES\n");
        else if (check - 2.0 * 3.14159265359 < 1e-12)
          printf("YES\n");
        else
          printf("NO\n");
      }
    }
  }
  return 0;
}
