#include <bits/stdc++.h>
int DBG = 0;
using namespace std;
const double eps = 1e-9;
const int oo = 1000000000;
const int N = 0;
int main() {
  int n, R, r;
  scanf("%d%d%d", &n, &R, &r);
  int ans;
  if (r > R)
    ans = 0;
  else if (r * 2 > R)
    ans = 1;
  else
    ans = int(acos(-1) / asin(r * 1.0 / (R - r)) + eps);
  puts(n <= ans ? "YES" : "NO");
  return 0;
}
