added the link to my task1

gt-workbench/exercise1/exercise.md

@@ -72,6 +72,8 @@ example(g, g.vertex_index);
 
 - Basti ([repo](https://git.skewed.de/bastikusch1/workshop-exercises))
 
+- Bukyoung ([tast1.hh](https://git.skewed.de/bukyoungjhun/traunsee/-/blob/main/exercise1/task1.hh) [task1.cc](https://git.skewed.de/bukyoungjhun/traunsee/-/blob/main/exercise1/task1.cc))
+
 # Task 2: Modify the code above to store for each vertex a vector with the 10 closest neighbors.
 
 Add your solution here as a link to a gitlab repository.