#include <bits/stdc++.h>
using namespace std;
int R, r;
int n;
double PI = acos(-1);
double EPS = 1e-7;
int main() {
  scanf("%d %d %d", &n, &R, &r);
  if (n == 1) {
    if (R >= r)
      printf("YES");
    else
      printf("NO");
    return 0;
  }
  double len = 2 * (R - r) * sin(PI / n);
  if (len > 2 * r + EPS || fabs(len - 2 * r) < EPS) {
    printf("YES");
  } else {
    printf("NO");
  }
  return 0;
}
