consecutive renaming files in sub folders

[entrk]

Hi, I wanted to make it so each file in a subfolder is following the name of a file in the previous subfolder. I'm not sure if I'm explaining it correctly. Im trying to get them properly named before moving them all to the same folder

Right now my files are like this:
/folder 1/01.jpg
/folder 2/01.jpg
/folder 3/01.jpg

I want it to be like this:
/folder 1/001.jpg
/folder 2/014.jpg
/folder 3/029.jpg

[Admin]

Are there 13 files in folder1 ? Then use numbering across subfolders