sgreen solutions to challenge 295

3 files changed, 79 insertions, 0 deletions

diff --git a/challenge-295/sgreen/python/ch-1.py b/challenge-295/sgreen/python/ch-1.py
new file mode 100755
index 0000000000..bed823f512
--- /dev/null
+++ b/challenge-295/sgreen/python/ch-1.py
@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+
+import re
+import sys
+
+
+def word_break(s: str, words: list) -> bool:
+    # Turn the words into a regular expression
+    pattern = '^(' + '|'.join(map(re.escape, words)) + ')+$'
+
+    # Check if the string matches the pattern
+    return True if re.search(pattern, s) else False
+
+
+def main():
+    # The first value is the string, the rest are the words
+    result = word_break(sys.argv[1], sys.argv[2:])
+    print('true' if result else 'false')
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-295/sgreen/python/ch-2.py b/challenge-295/sgreen/python/ch-2.py
new file mode 100755
index 0000000000..5aa6999eb9
--- /dev/null
+++ b/challenge-295/sgreen/python/ch-2.py
@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+
+import sys
+
+
+def jump_game(ints: list, moves=1) -> int:
+    # Calculate the minimum number of moves from this point
+    min_moves = None
+    for i in range(ints[0], 0, -1):
+        # We can complete the jump with this move
+        if i >= len(ints)-1:
+            return moves
+
+        # Skip if we can't move forward
+        if ints[i] == 0:
+            continue
+
+        # Call the function again jumping 'i' positions
+        m = jump_game(ints[i:], moves+1)
+        if m is not None and (min_moves is None or min_moves > m):
+            min_moves = m
+
+    return min_moves
+
+
+def main():
+    # Convert input into integers
+    array = [int(n) for n in sys.argv[1:]]
+    result = jump_game(array)
+    print(-1 if result is None else result)
+
+
+if __name__ == '__main__':
+    main()
diff --git a/challenge-295/sgreen/python/test.py b/challenge-295/sgreen/python/test.py
new file mode 100755
index 0000000000..33117a6d85
--- /dev/null
+++ b/challenge-295/sgreen/python/test.py
@@ -0,0 +1,23 @@
+#!/usr/bin/env python3
+
+import unittest
+ch_1 = __import__('ch-1')
+ch_2 = __import__('ch-2')
+
+
+class TestClass(unittest.TestCase):
+    def test_ch_1(self):
+        self.assertTrue(ch_1.word_break(
+            'weeklychallenge', ["challenge", "weekly"]))
+        self.assertTrue(ch_1.word_break('perlrakuperl', ["raku", "perl"]))
+        self.assertFalse(ch_1.word_break(
+            'sonsanddaughters', ["sons", "sand", "daughters"]))
+
+    def test_ch_2(self):
+        self.assertEqual(ch_2.jump_game([2, 3, 1, 1, 4]), 2)
+        self.assertEqual(ch_2.jump_game([2, 3, 0, 4]), 2)
+        self.assertEqual(ch_2.jump_game([2, 0, 0, 4]), None)
+
+
+if __name__ == '__main__':
+    unittest.main()