Merge pull request #10874 from pauloscustodio/master

Add Python solution to challenge 067

2 files changed, 80 insertions, 0 deletions

diff --git a/challenge-072/paulo-custodio/python/ch-1.py b/challenge-072/paulo-custodio/python/ch-1.py
new file mode 100644
index 0000000000..8f455f1ac8
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+++ b/challenge-072/paulo-custodio/python/ch-1.py
@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+
+# Challenge 072
+#
+# TASK #1 > Trailing Zeroes
+# Submitted by: Mohammad S Anwar
+# You are given a positive integer $N (<= 10).
+#
+# Write a script to print number of trailing zeroes in $N!.
+#
+# Example 1
+# Input: $N = 10
+# Output: 2 as $N! = 3628800 has 2 trailing zeroes
+#
+# Example 2
+# Input: $N = 7
+# Output: 1 as $N! = 5040 has 1 trailing zero
+#
+# Example 3
+# Input: $N = 4
+# Output: 0 as $N! = 24 has 0 trailing zero
+
+import re
+import sys
+
+def fact(n):
+    if n < 2:
+        return 1
+    else:
+        return n*fact(n-1)
+
+def trailing_zeros(n):
+    s = str(n)
+    if m := re.search(r'0+$', s):
+        return len(m.group(0))
+    else:
+        return 0
+
+N = int(sys.argv[1])
+print(trailing_zeros(fact(N)))
diff --git a/challenge-072/paulo-custodio/python/ch-2.py b/challenge-072/paulo-custodio/python/ch-2.py
new file mode 100644
index 0000000000..6d897d5b2b
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+++ b/challenge-072/paulo-custodio/python/ch-2.py
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+#!/usr/bin/env perl
+
+# Challenge 072
+#
+# TASK #2 > Lines Range
+# Submitted by: Mohammad S Anwar
+# You are given a text file name $file and range $A - $B where $A <= $B.
+#
+# Write a script to display lines range $A and $B in the given file.
+#
+# Example
+# Input:
+#     $ cat input.txt
+#     L1
+#     L2
+#     L3
+#     L4
+#     ...
+#     ...
+#     ...
+#     ...
+#     L100
+# $A = 4 and $B = 12
+# Output:
+#     L4
+#     L5
+#     L6
+#     L7
+#     L8
+#     L9
+#     L10
+#     L11
+#     L12
+
+import sys
+FILE, A, B = sys.argv[1], int(sys.argv[2]), int(sys.argv[3])
+
+f = open(sys.argv[1], "r")
+lines = [x.rstrip("\n") for x in f.readlines()]
+print("\n".join(lines[A-1:B]))