text: Compare elements on left and right of crossover point to find the k closest elements
code: while ( l >= 0 && r < n && count < k ) { if ( x - arr [ l ] < arr [ r ] - x ) { document . write ( arr [ l ] + " " ) l -= 1 } else { document . write ( arr [ r ] + " " ) r += 1 } count += 1 }