#include <bits/stdc++.h>
using namespace std;
double r, R, n, teta, pi, d;
int main() {
  while (cin >> n >> R >> r) {
    if (fabs(r - R) <= 1e-8) {
      if (fabs(n - 1) <= 1e-8) {
        puts("YES");
      } else {
        puts("NO");
      }
    } else if (r - R > 1e-8) {
      puts("NO");
    } else if (2 * r - R > 1e-8) {
      if (fabs(n - 1) <= 1e-8) {
        puts("YES");
      } else {
        puts("NO");
      }
    } else {
      pi = acos((double)-1);
      teta = asin(r / (R - r));
      d = pi / teta;
      if (fabs(d - n) <= 1e-8 || (d > n)) {
        puts("YES");
      } else {
        puts("NO");
      }
    }
  }
  return 0;
}
