Added challenges for #285

2 files changed, 124 insertions, 0 deletions

diff --git a/challenge-285/santiago-leyva/perl/ch-01.pl b/challenge-285/santiago-leyva/perl/ch-01.pl
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+=begin
+You are given a list of routes, @routes.
+
+Write a script to find the destination with no further outgoing connection.
+
+Example 1
+Input: @routes = (["B","C"], ["D","B"], ["C","A"])
+Output: "A"
+
+"D" -> "B" -> "C" -> "A".
+"B" -> "C" -> "A".
+"C" -> "A".
+"A".
+Example 2
+Input: @routes = (["A","Z"])
+Output: "Z"
+=cut
+
+use strict;
+use Data::Dumper;
+
+my @input  = ([["B","C"], ["D","B"], ["C","A"]],[["A","Z"]]);
+
+foreach(@input){
+  my $arr = $_;
+  my @A = @$arr;
+  my $dead_end = findDeadEnd(\@A);
+  print $dead_end."\n";
+}
+
+sub findDeadEnd {
+  my $array = shift;
+  my @route = @$array;
+  my @origin;
+  my @destination;
+  my @deadend;
+  for(0..scalar @route-1){
+    push @origin, $route[$_][0];
+  }
+  for(0..scalar @route-1){
+    push @destination, $route[$_][1];
+  }
+
+  foreach my $i (@destination){
+    if( !(grep( /^$i$/, @origin)) ){
+      push @deadend, $i;
+    }
+    
+  }
+
+  if(scalar @deadend > 1){
+    return "There are multiple routes with no outgoing connection";
+  }elsif(scalar @deadend == 0){
+    return "All routes have an outgoing connection";
+  }
+  return $deadend[0];
+  
+}
diff --git a/challenge-285/santiago-leyva/perl/ch-02.pl b/challenge-285/santiago-leyva/perl/ch-02.pl
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+++ b/challenge-285/santiago-leyva/perl/ch-02.pl
@@ -0,0 +1,66 @@
+=begin
+Compute the number of ways to make change for given amount in cents. By using the coins e.g. Penny, Nickel, Dime, Quarter and Half-dollar, in how many distinct ways can the total value equal to the given amount? Order of coin selection does not matter.
+
+A penny (P) is equal to 1 cent.
+A nickel (N) is equal to 5 cents.
+A dime (D) is equal to 10 cents.
+A quarter (Q) is equal to 25 cents.
+A half-dollar (HD) is equal to 50 cents.
+Example 1
+Input: $amount = 9
+Ouput: 2
+
+1: 9P
+2: N + 4P
+Example 2
+Input: $amount = 15
+Ouput: 6
+
+1: D + 5P
+2: D + N
+3: 3N
+4: 2N + 5P
+5: N + 10P
+6: 15P
+Example 3
+Input: $amount = 100
+Ouput: 292
+=cut
+
+use strict;
+use Data::Dumper;
+
+use Test::More tests => 3;
+
+is(makeChange(9),2,'Test 1');
+is(makeChange(15),6,'Test 2');
+is(makeChange(100),292,'Test 3');
+
+
+my @amount = (9,15,100);
+
+foreach(@amount){
+  my $_last_coin;
+  my $combination = makeChange($_,$_last_coin);
+  print "Number of Combinations for $_ is: $combination\n";
+}
+
+sub makeChange { 
+  my ($reamaining,$last_coin) = @_;
+  my $combinations = 0;
+  my @denomination = (1,5,10,25,50);
+  #print "$reamaining,$last_coin\n";
+  foreach my $coin (@denomination){
+    if($last_coin and $last_coin < $coin){
+      #print "$last_coin < $coin next\n";
+      last;
+    }elsif($coin == $reamaining){
+      $combinations += 1;
+    }elsif($coin < $reamaining){
+      $combinations += makeChange($reamaining-$coin,$coin);
+    }
+  }
+
+  return $combinations;
+
+}
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