diff --git a/environment.yml b/environment.yml
new file mode 100644
index 0000000..067d7d5
--- /dev/null
+++ b/environment.yml
@@ -0,0 +1,7 @@
+name: /opt/miniconda3/envs/cs197lec2
+channels:
+  - defaults
+dependencies:
+  - python=3.9
+  - tqdm
+prefix: /opt/miniconda3/envs/cs197lec2
diff --git a/environment_2.yml b/environment_2.yml
new file mode 100644
index 0000000..067d7d5
--- /dev/null
+++ b/environment_2.yml
@@ -0,0 +1,7 @@
+name: /opt/miniconda3/envs/cs197lec2
+channels:
+  - defaults
+dependencies:
+  - python=3.9
+  - tqdm
+prefix: /opt/miniconda3/envs/cs197lec2
diff --git a/number_of_ways.py b/number_of_ways.py
index bebe306..0c4947e 100644
--- a/number_of_ways.py
+++ b/number_of_ways.py
@@ -50,7 +50,7 @@ def test_number_of_ways():
 
     Input: startPos = 1, endPos = 2, k = 3
     Output: 3
-    Explanation: We can reach position 2 from 1 in exactly 3 steps
+    Explanation: We can reach position 2 from 1 in exactly 3 
     in three ways:
     - 1 -> 2 -> 3 -> 2.
     - 1 -> 2 -> 1 -> 2.