Update app.py

app.py

@@ -46,7 +46,7 @@ if st.button('Generate Prompt and Solution'):
         prompt_text, prompt, solution = generate_prompt(option)
         results.append([prompt_text, prompt, solution])
         
-    with open('results.txt', 'w') as f:
+    with open('results.txt', 'a') as f:
         for result in results:
             f.write(f"{result[0]}\t{result[1]}\t{result[2]}\n")