#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, r, r1;
  scanf("%d%d%d", &n, &r, &r1);
  float x;
  x = (float)r1 / (float)(r - r1);
  float angle = 2 * asin(x);
  float cover = angle * r;
  cover = (float)n * cover;
  float pi = acos(-1);
  if (((float)cover <= (float)(2 * pi * r) || n == 1) && r >= r1)
    printf("YES\n");
  else
    printf("NO\n");
  return 0;
}
