public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int dishCount = sc . nextInt ( ) ;
  int desk = sc . nextInt ( ) ;
  int dishR = sc . nextInt ( ) ;
  double angle = 360.0 / ( dishCount * 2 ) ;
  double minR = dishR / Math . sin ( Math . toRadians ( angle ) ) + dishR ;
  if ( dishCount == 1 ) {
    if ( desk >= dishR ) {
      System . out . println ( "YES" ) ;
      return ;
    }
    else {
      System . out . println ( "NO" ) ;
      return ;
    }
  }
  if ( dishCount == 2 ) {
    if ( 2 * dishR <= desk ) {
      System . out . println ( "YES" ) ;
      return ;
    }
    else {
      System . out . println ( "NO" ) ;
      return ;
    }
  }
  if ( desk >= minR ) {
    System . out . println ( "YES" ) ;
    return ;
  }
  else {
    System . out . println ( "NO" ) ;
    return ;
  }
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int dishCount = sc . nextInt ( ) ; int desk = sc . nextInt ( ) ; int dishR = sc . nextInt ( ) ; double angle = 360.0 / ( dishCount * 2 ) ; double minR = dishR / Math . sin ( Math . toRadians ( angle ) ) + dishR ; if ( dishCount == 1 ) { if ( desk >= dishR ) { System . out . println ( " YES " ) ; return ; } else { System . out . println ( " NO " ) ; return ; } } if ( dishCount == 2 ) { if ( 2 * dishR <= desk ) { System . out . println ( " YES " ) ; return ; } else { System . out . println ( " NO " ) ; return ; } } if ( desk >= minR ) { System . out . println ( " YES " ) ; return ; } else { System . out . println ( " NO " ) ; return ; } }
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