add more practice problem for the topic

Eslam Zanaty · web-flow · commit 563892e0b13c · 2022-03-09T20:59:45.000+02:00
diff --git a/src/linear_algebra/linear-system-gauss.md b/src/linear_algebra/linear-system-gauss.md
@@ -198,6 +198,7 @@ Therefore, the resulting Gauss-Jordan solution must sometimes be improved by app
 Thus, the solution turns into two-step: First, Gauss-Jordan algorithm is applied, and then a numerical method taking initial solution as solution in the first step.
 
 ## Practice Problems
+* [Codeforces - No game no life](https://codeforces.com/problemset/problem/1411/G)
 * [Spoj - Xor Maximization](http://www.spoj.com/problems/XMAX/)
 * [Codechef - Knight Moving](https://www.codechef.com/SEP12/problems/KNGHTMOV)
 * [Lightoj - Graph Coloring](http://lightoj.com/volume_showproblem.php?problem=1279)
