I use office, chrome, adobe reader and some other small programs for university. Would Lenovo yoga 350 (4GB 256 ssd i5) be good enough?

Yes, definitely.

It will work, but it will be slow.

I used an XPS 15 with 16GB of RAM with a 7th generation Intel Core i7. However, for the sweet spot I would opt in to go for an 8GB of RAM laptop. Trust me, I've recently graduated, and my laptop was my life. I want my laptop to be reliable and therefore brought a high performance one. My recommendation is to at least get a 7th gen intel core i5 with 8GB or RAM, I would also suggest not to by HP laptops as the chassis itself is plastic. Therefore the laptop hinge can break over time and that is not good at all… I hope this helps you a bunch!

The only problem is the ammount of RAM. If you can update with another 4gb ram, it will be better, because web browser nowadays consumes a lot of ram.