public static void main ( String [ ] args ) throws IOException {
  BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ;
  StringTokenizer st = new StringTokenizer ( br . readLine ( ) ) ;
  int n = Integer . parseInt ( st . nextToken ( ) ) ;
  int a = Integer . parseInt ( st . nextToken ( ) ) ;
  int b = Integer . parseInt ( st . nextToken ( ) ) ;
  int c = Integer . parseInt ( st . nextToken ( ) ) ;
  br . close ( ) ;
  PrintWriter pw = new PrintWriter ( System . out ) ;
  int count = 0 ;
  for ( int j = 0 ;
  j <= b ;
  j ++ ) {
    for ( int k = 0 ;
    k <= c ;
    k ++ ) {
      if ( n - j - 2 * k > 0 && n - j - 2 * k > 0.5 * a ) continue ;
      if ( n - j - 2 * k >= 0 ) count ++ ;
    }
  }
  pw . println ( count ) ;
  pw . flush ( ) ;
  pw . close ( ) ;
}

public static void main ( String [ ] args ) throws IOException { BufferedReader br = new BufferedReader ( new InputStreamReader ( System . in ) ) ; StringTokenizer st = new StringTokenizer ( br . readLine ( ) ) ; int n = Integer . parseInt ( st . nextToken ( ) ) ; int a = Integer . parseInt ( st . nextToken ( ) ) ; int b = Integer . parseInt ( st . nextToken ( ) ) ; int c = Integer . parseInt ( st . nextToken ( ) ) ; br . close ( ) ; PrintWriter pw = new PrintWriter ( System . out ) ; int count = 0 ; for ( int j = 0 ; j <= b ; j ++ ) { for ( int k = 0 ; k <= c ; k ++ ) { if ( n - j - 2 * k > 0 && n - j - 2 * k > 0.5 * a ) continue ; if ( n - j - 2 * k >= 0 ) count ++ ; } } pw . println ( count ) ; pw . flush ( ) ; pw . close ( ) ; }
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