Standard Lomuto partition function
static int partition ( int [ ] arr , int low , int high ) { int temp ; int pivot = arr [ high ] ; int i = ( low - 1 ) ; for ( int j = low ; j <= high - 1 ; j ++ ) { if ( arr [ j ] <= pivot ) { i ++ ; temp = arr [ i ] ; arr [ i ] = arr [ j ] ; arr [ j ] = temp ; } } temp = arr [ i + 1 ] ; arr [ i + 1 ] = arr [ high ] ; arr [ high ] = temp ; return ( i + 1 ) ; }