#include <bits/stdc++.h>
using namespace std;
long long int a[1005][1005];
int main() {
  long long int n, R, r;
  scanf("%lld%lld%lld", &n, &R, &r);
  if (r > R) {
    printf("NO");
    return 0;
  }
  if (2 * r > R) {
    if (n == 1)
      printf("YES");
    else
      printf("NO");
    return 0;
  }
  double len = asin((double)r / (R - r));
  double ans = 3.14159265359 / len;
  if (n > ans) {
    printf("NO\n");
    return 0;
  }
  printf("YES\n");
  return 0;
}
