1 files changed, 18 insertions, 0 deletions
diff --git a/challenge-018/orestis-zekai/python/ch-1.py b/challenge-018/orestis-zekai/python/ch-1.py
new file mode 100644
index 0000000000..e997db9e74
--- /dev/null
+++ b/challenge-018/orestis-zekai/python/ch-1.py
@@ -0,0 +1,18 @@
+# Longest common substring
+
+string1 = "ABABC"
+string2 = "BABCA"
+
+max_substring = ""
+max_length = -1
+
+
+for i in range(0, len(string1)+1):
+	for j in range(0, len(string1)+1):
+		if (string1[i:j] in string2) and len(string1[i:j]) > max_length:
+			max_length = len(string1[i:j])
+			max_substring = string1[i:j]
+
+
+print('The longest substring is: ' + max_substring)
+print('The length of the longest substring is: ' + str(max_length))
+\ No newline at end of file