#include <bits/stdc++.h>
using namespace std;
inline int read() {
  int x = 0, f = 1;
  char a = getchar();
  for (; a > '9' || a < '0'; a = getchar())
    if (a == '-') f = -1;
  for (; a >= '0' && a <= '9'; a = getchar()) x = x * 10 + a - '0';
  return x * f;
}
const double PI = acos(-1);
int n, R, r;
int main() {
  n = read();
  R = read();
  r = read();
  double alpha = 2 * PI / n / 2;
  double tr = R / (1 + 1 / sin(alpha));
  if (r - 1e-8 <= tr || (sin(alpha) <= 1e-8 && R >= r))
    printf("YES\n");
  else
    printf("NO\n");
  return 0;
}
