Ugly numbers problem

#1

https://ide.codingblocks.com/s/236649 it is giving one less op value for the input greater then 10 please help

#2

You are supposed to solve this question using the dynamic programming approach…

#3

please help me how to do that

#4

Pls refer to this tutorial for reference : https://youtu.be/78Yx7oLA43s