public static void main ( String [ ] args ) {
  Scanner sc = new Scanner ( System . in ) ;
  int N = sc . nextInt ( ) ;
  int L = 2 * N - 1 ;
  int [ ] a = new int [ L ] ;
  for ( int i = 0 ;
  i < L ;
  i ++ ) a [ i ] = sc . nextInt ( ) ;
  int min = 1 ;
  int max = L ;
  boolean b [ ] = new boolean [ L ] ;
  while ( min + 1 < max ) {
    int mid = ( min + max ) / 2 ;
    for ( int i = 0 ;
    i < L ;
    i ++ ) b [ i ] = a [ i ] >= mid ;
    if ( satisfy ( b ) ) min = mid ;
    else max = mid ;
  }
  System . out . println ( min ) ;
  sc . close ( ) ;
}

public static void main ( String [ ] args ) { Scanner sc = new Scanner ( System . in ) ; int N = sc . nextInt ( ) ; int L = 2 * N - 1 ; int [ ] a = new int [ L ] ; for ( int i = 0 ; i < L ; i ++ ) a [ i ] = sc . nextInt ( ) ; int min = 1 ; int max = L ; boolean b [ ] = new boolean [ L ] ; while ( min + 1 < max ) { int mid = ( min + max ) / 2 ; for ( int i = 0 ; i < L ; i ++ ) b [ i ] = a [ i ] >= mid ; if ( satisfy ( b ) ) min = mid ; else max = mid ; } System . out . println ( min ) ; sc . close ( ) ; }
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