#include <bits/stdc++.h>
using namespace std;
double PI = 2 * acos(0);
int n, R, r;
int main() {
  while (scanf("%d %d %d", &n, &R, &r) != EOF) {
    if (n == 1) {
      if (r <= R)
        puts("YES");
      else
        puts("NO");
    } else if (r >= R) {
      puts("NO");
    } else {
      double a = R - r, b = a, c = 2.0 * r;
      double y = acos((a * a + b * b - c * c) / (2 * a * b));
      int maxn = (int)(2 * PI / y + 1e-9);
      puts((n <= maxn) ? "YES" : "NO");
    }
  }
}
