static int findMinimumAdjacentSwaps ( int arr [ ] , int N ) {
  boolean [ ] visited = new boolean [ N + 1 ] ;
  int minimumSwaps = 0 ;
  Arrays . fill ( visited , false ) ;
  for ( int i = 0 ;
  i < 2 * N ;
  i ++ ) {
    if ( visited [ arr [ i ] ] == false ) {
      visited [ arr [ i ] ] = true ;
      int count = 0 ;
      for ( int j = i + 1 ;
      j < 2 * N ;
      j ++ ) {
        if ( visited [ arr [ j ] ] == false ) count ++ ;
        else if ( arr [ i ] == arr [ j ] ) minimumSwaps += count ;
      }
    }
  }
  return minimumSwaps ;
}

static int findMinimumAdjacentSwaps ( int arr [ ] , int N ) { boolean [ ] visited = new boolean [ N + 1 ] ; int minimumSwaps = 0 ; Arrays . fill ( visited , false ) ; for ( int i = 0 ; i < 2 * N ; i ++ ) { if ( visited [ arr [ i ] ] == false ) { visited [ arr [ i ] ] = true ; int count = 0 ; for ( int j = i + 1 ; j < 2 * N ; j ++ ) { if ( visited [ arr [ j ] ] == false ) count ++ ; else if ( arr [ i ] == arr [ j ] ) minimumSwaps += count ; } } } return minimumSwaps ; }
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