[2022] add practice contest 4

Author: exoji2e

ncpc2022/index.md

@@ -3,7 +3,7 @@ layout: default
 headerText: "NCPC 2022"
 title: "Nordic Collegiate Programming Contest 2022"
 dateTime: "Saturday October 8th 11:00-16:00 CEST (UTC+2)"
-lastUpdate: "2022-09-29"
+lastUpdate: "2022-09-30"
 year: 2022
 ---
 <nav class="navbar menu-bar" markdown="0">
@@ -53,7 +53,7 @@ There will be some practice contests on kattis before NCPC.
   <tr><td>2022-09-11 11-16</td><td><a href="https://open.kattis.com/contests/ncpc22practice1">https://open.kattis.com/contests/ncpc22practice1</a></td></tr>
   <tr><td>2022-09-17 11-16</td><td><a href="https://open.kattis.com/contests/ncpc22practice2">https://open.kattis.com/contests/ncpc22practice2</a></td></tr>
   <tr><td>2022-09-25 11-16</td><td><a href="https://open.kattis.com/contests/ncpc22practice3">https://open.kattis.com/contests/ncpc22practice3</a></td></tr>
-  <tr><td>2022-10-01 11-16</td><td></td></tr>
+  <tr><td>2022-10-01 11-16</td><td><a href="https://open.kattis.com/contests/ncpc22practice4">https://open.kattis.com/contests/ncpc22practice4</a></td></tr>
   <tr><td>2022-10-01 18-23</td><td><a href="https://maps22.kattis.com/contests/maps22">https://maps22.kattis.com/contests/maps22</a></td></tr>
 </table>