Update README.md

nuoxoxo · Oct 1, 2024 · accf892 · accf892
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@@ -3,7 +3,8 @@
 `$ export COOK=" ... "`
 
 ### __Notes__
-- 33/ --- _quite possibly a knapsack problem_
+- 33/ coin chain / knapsack problem
+- 21/ shortest / min cost path - Dijkstra
 - 18/ hour arithmetic - add 1 or -1 second
 - 17/ date arithmetic - `currdate.Sub(prevdate)` 
 - 15/ bidirectional BFS