Merge branch 'issues/720' of https://github.com/lvlte/Javascript into issues/720

Author: lvlte

DIRECTORY.md

@@ -193,12 +193,12 @@
  * [Haversine](https://github.com/TheAlgorithms/Javascript/blob/master/Navigation/Haversine.js)
 
 ## Project-Euler
+ * [Problem001](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem001.js)
  * [Problem013](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem013.js)
  * [Problem014](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem014.js)
  * [Problem015](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem015.js)
  * [Problem016](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem016.js)
  * [Problem020](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem020.js)
- * [Problem1](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem1.js)
  * [Problem10](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem10.js)
  * [Problem2](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem2.js)
  * [Problem3](https://github.com/TheAlgorithms/Javascript/blob/master/Project-Euler/Problem3.js)