#include <bits/stdc++.h>
using namespace std;
template <class T>
T abs(T x) {
  return x > 0 ? x : -x;
}
const int INF = 1e9;
const int MOD = 1e9 + 7;
const int maxn = 1000 + 7;
int n, m, t, T;
double R, r;
double pi = acos(-1);
double eps = 1e-7;
int main() {
  scanf("%d", &n);
  scanf("%d", &R);
  scanf("%d", &r);
  double xx;
  if (r > R) {
    puts("NO");
    return 0;
  }
  if (r > R / 2) {
    xx = 1;
    if (int(xx) >= n)
      puts("YES");
    else
      puts("NO");
  } else {
    double x = asin(r / (R - r));
    xx = 2.0 * x / pi * 180.0;
    if (xx * n <= 360.0 + eps)
      puts("YES");
    else
      puts("NO");
  }
  return 0;
}
