public static void main ( String [ ] args ) {
  Scanner scanner = new Scanner ( System . in ) ;
  int n = scanner . nextInt ( ) ;
  int a = scanner . nextInt ( ) ;
  int b = scanner . nextInt ( ) ;
  int c = scanner . nextInt ( ) ;
  int d = scanner . nextInt ( ) ;
  int A = b - c ;
  int B = a - d ;
  int C = a + b - c - d ;
  long sub = Math . max ( Math . max ( A , B ) , C ) ;
  long diff = Math . min ( Math . min ( A , B ) , C ) ;
  if ( diff < 0 ) {
    if ( sub < 0 ) sub = 0 ;
    sub -= diff ;
  }
  long count = n - sub ;
  if ( count < 0 ) count = 0 ;
  else count *= n ;
  System . out . println ( count ) ;
}

public static void main ( String [ ] args ) { Scanner scanner = new Scanner ( System . in ) ; int n = scanner . nextInt ( ) ; int a = scanner . nextInt ( ) ; int b = scanner . nextInt ( ) ; int c = scanner . nextInt ( ) ; int d = scanner . nextInt ( ) ; int A = b - c ; int B = a - d ; int C = a + b - c - d ; long sub = Math . max ( Math . max ( A , B ) , C ) ; long diff = Math . min ( Math . min ( A , B ) , C ) ; if ( diff < 0 ) { if ( sub < 0 ) sub = 0 ; sub -= diff ; } long count = n - sub ; if ( count < 0 ) count = 0 ; else count *= n ; System . out . println ( count ) ; }
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