Mastering Algorithms with Perl phần 2 doc

... space with each check, finding the desired element with at most 20 additional checks. The reductions combine so that you only need to do log 2 N checks. In the 2, 000-page Toronto phone book (with ... attempt the following: @array = qw( 123 4 + 12 5 -3 ); @sorted = sort @array; print "sorted = @sorted\n"; This produces the strange result: sorted = + 12 -3 123 4 5 This is...

Ngày tải lên: 12/08/2014, 21:20

... Graph::Directed->new(); $g->add_weighted_path(qw(a 1 b 4 c 1 d)); $g->add_weighted_path(qw(a 3 f 1 e 2 d)); $g->add_weighted_edges(qw(a 2 c a 4 d b 2 e f 2 d)); my $SSSP = $g->SSSP_Dijkstra("a"); foreach my $u ... edge is seen for the first time my $M = $V * ($V 1); $M = $M / 2 if $G->undirected; return ($M/4, 3*$M/4, $M); } Page 29 7 With this help...

Ngày tải lên: 12/08/2014, 21:20

... efficiently. Set Differences 21 7 Counting Set Elements 22 2 Set Relations 22 3 The Set Modules of CPAN 22 7 Sets of Sets 23 3 Multivalued Sets 24 0 Sets Summary 24 2 7. Matrices 24 4 Creating Matrices 24 6 Manipulating ... executed, The Matrix Chain Product 26 9 Delving Deeper 27 2 8. Graphs 27 3 Vertices and Edges 27 6 Derived Graphs 28 1 Graph Attributes 28 6 Graph Represent...

Ngày tải lên: 12/08/2014, 21:20

... 2 N 2 N 2 stable insensitive bubble N 2 N N 2 unstable sensitive insertion N 2 N N 2 stable sensitive shell N (log N) 2 N (log N) 2 N (log N) 2 stable sensitive merge N log N N log N N ... string ABCD can be seen as a number in base 25 6 as follows: D + C* 25 6 + B* 25 6 2 + A* 25 6 3 . The keys have to have the same number of bits because radix algorithms walk th...

Ngày tải lên: 12/08/2014, 21:20

... 20 0 MHz Pentium Pro with NetBSD release 1.2G showed that running nu took 0. 62 CPU seconds; therefore, the actual testing parts of ta and tb took 5. 92 – 0. 62 = 5.30 CPU seconds and 6.67 – 0. 62 ... example, 4,503,599, 627 ,370,495 or 2 52 -1. Page 23 1 $vector = Bit::Vector->new( 8000 ); # Set the bits 1000 20 00. $vector->Interval_Fill( 1000, 20 00 ); # Clear the bits 1...

Ngày tải lên: 12/08/2014, 21:20

... "escape." "ABCDE" == 65 * (25 6**4 % 8355967) + 66 * (25 6**3 % 8355967) + 67 * (25 6* *2 % 8355967) + 68 * 25 6 + 69 == 65 * 167 121 92 + 66 * 6 528 2 + 67 * 65536 + 68 * 25 6 + 69 == == 377804 We ... 147, 483, 647. The reason for using 2, 147, 483, 647, 2 31 - 1, instead of 4 ,29 4,967 ,29 5, 2 32 - 1, will be explained shortly. The prime we are loo...

Ngày tải lên: 12/08/2014, 21:20

... to 123 4.5678. We'll start off with %d: printf "%d", 123 4.5678; # prints " 123 4" printf "%2d", 123 4.5678; # prints " 123 4" printf "%6d", 123 4.5678; ... " 123 4.6" printf "%.2f", 123 4.5678; # prints " 123 4.57" printf "%.3f", 123 4.5678; # prints " 123 4.568" printf "%.4f"...

Ngày tải lên: 12/08/2014, 21:20

... k.break ** 1 2 3 4 5 0 0 0 0 0 0 1 1 1 1 1 1 2 2 4 3 1 2 3 3 4 2 1 3 4 4 1 4 1 4 ** 1 2 3 4 5 6 0 0 0 0 0 0 0 1 1 1 1 1 1 1 2 2 4 2 4 2 4 3 3 3 3 3 3 3 4 4 4 4 4 4 4 5 5 1 5 1 5 1 Page 520 When the ... can do the same in Perl (e.g., $r1^=$r2; $r2^=$r1; $r1^=$r2;), but for simple scalar values it's clearer to just write the operation as ($r1, $r2) = ($r2, $r1); and let...

Ngày tải lên: 12/08/2014, 21:20

... 28 /25 6 37 /25 6 = 0.1445 5 56 /25 6 93 /25 6 = 0.3633 4 70 /25 6 163 /25 6 = 0.6367 3 56 /25 6 21 9 /25 6 = 0.8555 2 28 /25 6 24 7 /25 6 = 0.9648 1 8 /25 6 25 5 /25 6 = 0.9961 0 1 /25 6 25 6 /25 6 = 1.0000 Given eight successive ... Associated with Choices Number of left clicks, k Probability of exactly k left clicks Probability of at least k left clicks 8 1 /25 6 1 /25 6 = 0.0039...

Ngày tải lên: 12/08/2014, 21:20

... sorting algorithms, 120 -133 bubble sort, 125 - 128 , 1 52 insertion sort, 128 -131, 1 52 maxima and minima, 122 - 125 selection sort, 120 - 122 , 151 shellsort, 131-133, 153 quartile( ), 1 42 quartiles, 603 queues, ... 24 6 elements of sets (see members of sets) emit( ), 4 02- 403 chain products, 26 9 -27 2 rotating, 25 8 transposing, 25 4 -25 5 maxima/minima sort, 122 - 125 maximu...

Ngày tải lên: 12/08/2014, 21:20