Update Day_23.md

Author: darkprinx

Status/Day_23.md

@@ -28,6 +28,26 @@ arr.sort()
 print(arr[-2])
 ```
 ---------------------
+```python
+'''
+Solution by: mishrasunny-coder
+'''
+num = int(input("Enter num: "))
+L = []
+
+while True:
+    L.append(num)
+    num = int(input("Enter another: "))
+    if num == 0:
+        break
+
+L1 = list(set(L[:]))
+L2 = sorted(L1)
+print(L2)
+
+print(f'The runner up is {L2[-2]}')
+```
+---------------------
 
 # Question 96