#include <bits/stdc++.h>
using namespace std;
template <class T>
inline bool read(T &ret) {
  char c;
  int sgn;
  if (c = getchar(), c == EOF) return false;
  while (c != '-' && (c < '0' || c > '9')) c = getchar();
  sgn = (c == '-') ? -1 : 1;
  ret = (c == '-') ? 0 : (c - '0');
  while (c = getchar(), c >= '0' && c <= '9') ret = ret * 10 + (c - '0');
  ret *= sgn;
  return true;
}
template <class T>
inline void output(T answer) {
  if (answer < 0) {
    putchar('-');
    answer = -answer;
  }
  if (answer >= 10) output(answer / 10);
  putchar(answer % 10 + '0');
  return;
}
template <class T>
inline T gcd(T m, T n) {
  return n == 0 ? m : abs(gcd(n, m % n));
}
inline long long qmul(long long, long long, long long);
inline long long qpow_qmul(long long, long long, long long);
inline long long mul(long long, long long, long long);
inline long long qpow(long long, long long, long long);
inline long long qpow_mul(long long, long long, long long);
const int N = 1e5 + 6;
const int M = 1e6 + 10;
const long long INF = 1e18 + 1;
const long long mod = 1e9 + 7;
const double PI = acos(-1.0);
int main() {
  int n, R, r;
  scanf("%d%d%d", &n, &R, &r);
  if (n == 1) {
    if (R >= r)
      printf("YES\n");
    else
      printf("NO\n");
  } else if (n == 2) {
    if (R >= 2 * r)
      printf("YES\n");
    else
      printf("NO\n");
  } else {
    double angle = 360.0 / n, r1;
    angle = angle / 180.0 * PI / 2.0;
    r1 = 1.0 * r / sin(angle);
    if (1.0 * R - r1 - 1.0 * r >= -1e-9)
      printf("YES\n");
    else
      printf("NO\n");
  }
  return 0;
}
inline long long mul(long long a, long long b, long long MOD) {
  long long L = a * (b >> 25ll) % MOD * (1ll << 25) % MOD;
  long long R = a * (b & ((1ll << 25) - 1)) % MOD;
  return (L + R) % MOD;
}
inline long long qpow_mul(long long x, long long n, long long MOD) {
  long long ans = 1, a = x % MOD;
  while (n) {
    if (n & 1) {
      ans = mul(ans, a, MOD);
    }
    a = mul(a, a, MOD);
    n >>= 1;
  }
  return ans;
}
inline long long qmul(long long a, long long b, long long MOD) {
  long long ans = 0, x = a;
  while (b) {
    if (b & 1) {
      ans = (ans + x) % MOD;
    }
    x = x * 2 % MOD;
    b >>= 1;
  }
  return ans % MOD;
}
inline long long qpow_qmul(long long x, long long n, long long MOD) {
  long long ans = 1, a = x % MOD;
  while (n) {
    if (n & 1) {
      ans = qmul(ans, a, MOD);
    }
    a = qmul(a, a, MOD);
    n >>= 1;
  }
  return ans;
}
inline long long qpow(long long x, long long n, long long MOD) {
  if (x == 1) return x % MOD;
  long long ans = 1, a = x;
  while (n) {
    if (n & 1) {
      ans = ans * a % MOD;
    }
    a = a * a % MOD;
    n >>= 1;
  }
  return ans;
}
