diff --git a/Problem1_Articles.py b/Problem1_Articles.py
new file mode 100644
index 0000000..83090f2
--- /dev/null
+++ b/Problem1_Articles.py
@@ -0,0 +1,7 @@
+import pandas as pd
+
+def article_views(views: pd.DataFrame) -> pd.DataFrame:
+    df=views[views['author_id']==views['viewer_id']]
+    df.drop_duplicates(subset='author_id',inplace=True)
+    df.sort_values(by=['author_id'],inplace=True)
+    return pd.DataFrame(df[['author_id']]).rename(columns={'author_id':'id'})
\ No newline at end of file
diff --git a/Problem2_InvalidTweets.py b/Problem2_InvalidTweets.py
new file mode 100644
index 0000000..676bb0a
--- /dev/null
+++ b/Problem2_InvalidTweets.py
@@ -0,0 +1,5 @@
+import pandas as pd
+
+def invalid_tweets(tweets: pd.DataFrame) -> pd.DataFrame:
+    invalid=tweets[tweets['content'].str.len()>15]
+    return invalid[['tweet_id']]
\ No newline at end of file