diff --git a/problem1.py b/problem1.py
new file mode 100644
index 0000000..baef63d
--- /dev/null
+++ b/problem1.py
@@ -0,0 +1,9 @@
+import pandas as pd
+
+def article_views(views: pd.DataFrame) -> pd.DataFrame:
+    condition = views[views['author_id'] == views['viewer_id']].drop_duplicates(subset=['author_id'])
+    condition = condition.rename(columns={'author_id': 'id'})
+
+    result = condition['id'].sort_values()
+
+    return pd.DataFrame(result)
\ No newline at end of file
diff --git a/problem2.py b/problem2.py
new file mode 100644
index 0000000..6540b12
--- /dev/null
+++ b/problem2.py
@@ -0,0 +1,5 @@
+import pandas as pd
+
+def invalid_tweets(tweets: pd.DataFrame) -> pd.DataFrame:
+    invalid_tweets_df = tweets[tweets['content'].str.len() > 15]
+    return invalid_tweets_df[['tweet_id']]
\ No newline at end of file