#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, R, r;
  while (cin >> n >> R >> r) {
    if (r << 1 >= R) {
      if (n <= R / r)
        printf("YES\n");
      else
        printf("NO\n");
    } else {
      double angle = asin((double)r / (R - r));
      if (n * angle - 1e-7 > acos((double)-1.0))
        printf("NO\n");
      else
        printf("YES\n");
    }
  }
  return 0;
}
