6 files changed, 94 insertions, 27 deletions
diff --git a/challenge-016/paulo-custodio/Makefile b/challenge-016/paulo-custodio/Makefile
new file mode 100644
index 0000000000..c3c762d746
--- /dev/null
+++ b/challenge-016/paulo-custodio/Makefile
@@ -0,0 +1,2 @@
+all:
+	perl ../../challenge-001/paulo-custodio/test.pl
diff --git a/challenge-016/paulo-custodio/python/ch-1.py b/challenge-016/paulo-custodio/python/ch-1.py
new file mode 100644
index 0000000000..e4ce675a5d
--- /dev/null
+++ b/challenge-016/paulo-custodio/python/ch-1.py
@@ -0,0 +1,32 @@
+#!/usr/bin/python3
+
+# Challenge 016
+#
+# Task #1
+# Pythagoras Pie Puzzle, proposed by Jo Christian Oterhals.
+#
+# At a party a pie is to be shared by 100 guest. The first guest gets 1% of the
+# pie, the second guest gets 2% of the remaining pie, the third gets 3% of the
+# remaining pie, the fourth gets 4% and so on.
+#
+# Write a script that figures out which guest gets the largest piece of pie.
+
+import operator
+
+class Slice():
+    def __init__(self, guest, slice):
+        self.guest = guest
+        self.slice = slice
+    def __str__(self):
+        return f"Slice({self.guest}, {self.slice})"
+
+slices = []
+pie = 1
+for guest in range(1, 101):
+    slice = guest/100*pie
+    pie -= slice
+    slices.append(Slice(guest, slice))
+slices.sort(key=operator.attrgetter('slice'))
+slice = slices[-1]
+
+print("Guest {} gets {:.4f}% of the pie.".format(slice.guest, 100*slice.slice))
diff --git a/challenge-016/paulo-custodio/python/ch-2.py b/challenge-016/paulo-custodio/python/ch-2.py
new file mode 100644
index 0000000000..dea3be6947
--- /dev/null
+++ b/challenge-016/paulo-custodio/python/ch-2.py
@@ -0,0 +1,25 @@
+#!/usr/bin/python3
+
+# Challenge 016
+#
+# Task #2
+# Write a script to validate a given bitcoin address. Most Bitcoin addresses
+# are 34 characters. They consist of random digits and uppercase and lowercase
+# letters, with the exception that the uppercase letter "O", uppercase letter "I",
+# lowercase letter "l", and the number "0" are never used to prevent visual
+# ambiguity. A bitcoin address encodes 25 bytes. The last four bytes are a
+# checksum check. They are the first four bytes of a double SHA-256 digest
+# of the previous 21 bytes. For more information, please refer wiki page.
+# Here are some valid bitcoin addresses:
+#
+#     1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2
+#     3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy
+
+import sys
+from cryptoaddress import BitcoinAddress
+
+try:
+    bitcoin_address = BitcoinAddress(sys.argv[1], network_type='mainnet')
+    print(1)
+except ValueError:
+    print(0)
diff --git a/challenge-016/paulo-custodio/t/test-1.yaml b/challenge-016/paulo-custodio/t/test-1.yaml
new file mode 100644
index 0000000000..a2751e2584
--- /dev/null
+++ b/challenge-016/paulo-custodio/t/test-1.yaml
@@ -0,0 +1,5 @@
+- setup:
+  cleanup:
+  args:
+  input:
+  output:   Guest 10 gets 6.2816% of the pie.
diff --git a/challenge-016/paulo-custodio/t/test-2.yaml b/challenge-016/paulo-custodio/t/test-2.yaml
new file mode 100644
index 0000000000..f45312b812
--- /dev/null
+++ b/challenge-016/paulo-custodio/t/test-2.yaml
@@ -0,0 +1,30 @@
+- setup:
+  cleanup:
+  args:     1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2
+  input:
+  output:   1
+- setup:
+  cleanup:
+  args:     3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy
+  input:
+  output:   1
+- setup:
+  cleanup:
+  args:     2BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2
+  input:
+  output:   0
+- setup:
+  cleanup:
+  args:     4J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy
+  input:
+  output:   0
+- setup:
+  cleanup:
+  args:     1lvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2
+  input:
+  output:   0
+- setup:
+  cleanup:
+  args:     3O98t1WpEZ73CNmQviecrnyiWrnqRhWNLy
+  input:
+  output:   0
diff --git a/challenge-016/paulo-custodio/test.pl b/challenge-016/paulo-custodio/test.pl
deleted file mode 100644
index 1017049192..0000000000
--- a/challenge-016/paulo-custodio/test.pl
+++ /dev/null
@@ -1,27 +0,0 @@
-#!/usr/bin/perl
-
-use Modern::Perl;
-use Test::More;
-
-is capture("perl perl/ch-1.pl binary"), <<END;
-Guest 10 gets 6.2816% of the pie.
-END
-
-is capture("perl perl/ch-2.pl 1BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2"), "1\n";
-is capture("perl perl/ch-2.pl 3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy"), "1\n";
-
-is capture("perl perl/ch-2.pl 2BvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2"), "0\n";
-is capture("perl perl/ch-2.pl 4J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy"), "0\n";
-
-is capture("perl perl/ch-2.pl 1lvBMSEYstWetqTFn5Au4m4GFg7xJaNVN2"), "0\n";
-is capture("perl perl/ch-2.pl 3O98t1WpEZ73CNmQviecrnyiWrnqRhWNLy"), "0\n";
-
-
-done_testing;
-
-sub capture {
-    my($cmd) = @_;
-    my $out = `$cmd`;
-    $out =~ s/[ \t\v\f\r]*\n/\n/g;
-    return $out;
-}