updating DIRECTORY.md

c0c83054 · github-actions · 623210b3 · c0c83054
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DIRECTORY.md DIRECTORY.md +1 -0

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--- a/DIRECTORY.md
+++ b/DIRECTORY.md
@@ -203,6 +203,7 @@
 ## ProjectEuler
  * [Problem01](https://github.com/TheAlgorithms/Java/blob/master/ProjectEuler/Problem01.java)
  * [Problem02](https://github.com/TheAlgorithms/Java/blob/master/ProjectEuler/Problem02.java)
+  * [Problem04](https://github.com/TheAlgorithms/Java/blob/master/ProjectEuler/Problem04.java)

 ## Searches
  * [BinarySearch](https://github.com/TheAlgorithms/Java/blob/master/Searches/BinarySearch.java)