#include <bits/stdc++.h>
using namespace std;
static const int MAXN = 1e5 + 10;
static const double PI = acos(-1.0);
static const double eps = 1e-12;
int n, R, r;
int main() {
  while (~scanf("%d%d%d", &n, &R, &r)) {
    if (n == 1) {
      puts(r > R ? "NO" : "YES");
      continue;
    }
    double s = asin((r + 0.0) / (R - r + 0.0));
    double mx = s * (n);
    if (PI - mx > -eps)
      puts("YES");
    else
      puts("NO");
  }
  return 0;
}
