#include <bits/stdc++.h>
int n, R, r;
int main() {
  while (scanf("%d%d%d", &n, &R, &r) != EOF) {
    double pi = acos(-1);
    double a = 2 * (R - r) * sin(pi / n);
    double b = 2 * r;
    if ((n == 1 && R >= r) || a - b >= -(1e-6))
      printf("YES\n");
    else
      printf("NO\n");
  }
  return 0;
}
