From 0bdf5928c01ed343627fb572ba43ec2e77bd43f7 Mon Sep 17 00:00:00 2001
From: Roger Bell_West <roger@firedrake.org>
Date: Mon, 17 May 2021 12:59:43 +0100
Subject: Solutions for challenge #113

---
 challenge-113/roger-bell-west/python/ch-1.py | 27 +++++++++++++++++++++++++++
 challenge-113/roger-bell-west/python/ch-2.py | 23 +++++++++++++++++++++++
 2 files changed, 50 insertions(+)
 create mode 100755 challenge-113/roger-bell-west/python/ch-1.py
 create mode 100755 challenge-113/roger-bell-west/python/ch-2.py

(limited to 'challenge-113/roger-bell-west/python')

diff --git a/challenge-113/roger-bell-west/python/ch-1.py b/challenge-113/roger-bell-west/python/ch-1.py
new file mode 100755
index 0000000000..4252d22ba5
--- /dev/null
+++ b/challenge-113/roger-bell-west/python/ch-1.py
@@ -0,0 +1,27 @@
+#! /usr/bin/python3
+
+import unittest
+import re
+
+def ri(n,d):
+  dd=re.compile(".*"+str(d)+".*")
+  e=[i for i in range(1,n+1) if re.match(dd,str(i))]
+  for i in range(1,1<<len(e)):
+    s=0
+    for ii in range(len(e)):
+      if 1<<ii & i:
+        s += e[ii]
+    if s==n:
+      return 1
+  return 0
+
+class TestRi(unittest.TestCase):
+
+        def test_ex1(self):
+          self.assertEqual(ri(25,7),0,'example 1')
+          
+        def test_ex2(self):
+          self.assertEqual(ri(24,7),1,'example 2')
+          
+
+unittest.main()
diff --git a/challenge-113/roger-bell-west/python/ch-2.py b/challenge-113/roger-bell-west/python/ch-2.py
new file mode 100755
index 0000000000..48a01cb2b0
--- /dev/null
+++ b/challenge-113/roger-bell-west/python/ch-2.py
@@ -0,0 +1,23 @@
+#! /usr/bin/python3
+
+import unittest
+
+def rbt(ti):
+  s=0
+  for n in ti:
+    if n>0:
+      s += n
+  to=list()
+  for n in ti:
+    if n>0:
+      to.append(s-n)
+    else:
+      to.append(n)
+  return to
+
+class TestRbt(unittest.TestCase):
+
+        def test_ex1(self):
+          self.assertEqual(rbt([1,2,3,4,-1,5,6,-1,7]),[27,26,25,24,-1,23,22,-1,21],'example 1')
+
+unittest.main()
-- 
cgit