1 files changed, 13 insertions, 0 deletions
diff --git a/progs/a423.py b/progs/a423.py
new file mode 100644
index 0000000..4bd6530
--- /dev/null
+++ b/progs/a423.py
@@ -0,0 +1,13 @@
+def max_len_sub( arr, n): 
+	mls=[] 
+	max = 0
+	for i in range(n): 
+		mls.append(1) 
+	for i in range(n): 
+		for j in range(i): 
+			if (abs(arr[i] - arr[j]) <= 1 and mls[i] < mls[j] + 1): 
+				mls[i] = mls[j] + 1
+	for i in range(n): 
+		if (max < mls[i]): 
+			max = mls[i] 
+	return max
+\ No newline at end of file