public static void main ( String [ ] args ) {
  FastScanner input = new FastScanner ( ) ;
  long n = input . nextInt ( ) ;
  long a , b , c , d ;
  a = input . nextInt ( ) ;
  b = input . nextInt ( ) ;
  c = input . nextInt ( ) ;
  d = input . nextInt ( ) ;
  long count = 0 ;
  for ( int i = 1 ;
  i <= n ;
  i ++ ) {
    long z1 = b - c + i ;
    long x2 = i + a - d ;
    long z2 = i + a + b - c - d ;
    if ( ( z1 > 0 && z1 <= n ) && ( x2 > 0 && x2 <= n ) && ( z2 > 0 && z2 <= n ) ) {
      count ++ ;
    }
  }
  System . out . println ( count * n ) ;
}

public static void main ( String [ ] args ) { FastScanner input = new FastScanner ( ) ; long n = input . nextInt ( ) ; long a , b , c , d ; a = input . nextInt ( ) ; b = input . nextInt ( ) ; c = input . nextInt ( ) ; d = input . nextInt ( ) ; long count = 0 ; for ( int i = 1 ; i <= n ; i ++ ) { long z1 = b - c + i ; long x2 = i + a - d ; long z2 = i + a + b - c - d ; if ( ( z1 > 0 && z1 <= n ) && ( x2 > 0 && x2 <= n ) && ( z2 > 0 && z2 <= n ) ) { count ++ ; } } System . out . println ( count * n ) ; }
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