print left part of the path in reverse order
if ( f == 0 ) { for ( i = len - 1 ; i >= 0 ; i -- ) { printf ( " % d ▁ " , ints [ i ] ) ; } } else if ( f == 1 ) { for ( i = 0 ; i < len ; i ++ ) { printf ( " % d ▁ " , ints [ i ] ) ; } } }