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@@ -49,8 +49,8 @@ In this repository, you'll find codes for Data Structure Lab.
 16. [Assignment 16 - Quick sort](https://git.kska.io/sppu-se-comp-codes/DSL/src/branch/main/lab-manuals/Lab%20Assignment%20B_16.pdf)
 19. [Assignment 19 - Pinnacle Club](https://git.kska.io/sppu-se-comp-codes/DSL/src/branch/main/lab-manuals/Lab%20Assignment%20C_19.pdf)
 20. [Assignment 20 - Cinemax theater](https://git.kska.io/sppu-se-comp-codes/DSL/src/branch/main/lab-manuals/Lab%20Assignment%20C_20.pdf)
-26. [Assignment 26 - Stack (Expression)](https://git.kska.io/sppu-se-comp-codes/DSL/src/branch/main/lab-manuals/Lab%20Assignment%20D_26.docx)
-27. [Assignment 27 - Stack (Infix to posfix)](https://git.kska.io/sppu-se-comp-codes/DSL/src/branch/main/lab-manuals/Lab%20Assignment%20D_27.docx)
+26. [Assignment 26 - Stack (Expression)](https://git.kska.io/sppu-se-comp-codes/DSL/src/branch/main/lab-manuals/Lab%20Assignment%20D_26.pdf)
+27. [Assignment 27 - Stack (Infix to posfix)](https://git.kska.io/sppu-se-comp-codes/DSL/src/branch/main/lab-manuals/Lab%20Assignment%20D_27.pdf)
 29. [Assignment 29 - Queue job](https://git.kska.io/sppu-se-comp-codes/DSL/src/branch/main/lab-manuals/Lab%20Assignment%20E_29.pdf)
 30. Assignment 30 - Priority queue - _TO BE ADDED_
 31. [Assignment 31 - Double-ended queue](https://git.kska.io/sppu-se-comp-codes/DSL/src/branch/main/lab-manuals/Lab%20Assignment%20E_31.pdf)
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