Compare elements on left and right of crossover point to find the k closest elements
while ( $ l >= 0 and $ r < $ n and $ count < $ k ) { if ( $ x - $ arr [ $ l ] < $ arr [ $ r ] - $ x ) echo $ arr [ $ l -- ] , " ▁ " ; else echo $ arr [ $ r ++ ] , " ▁ " ; $ count ++ ; }