Waterfall layout in collection view & Mopub Ads

I want to create a collectionView with two different cell and look like a waterfall layout. But first cell is MoPub Ads and others is basic item cell. First cell is must be return 1 column other have to be return 2.

Is anyone knows any example code like this?

This is what i make so far;

Hi @3rsin3rgul,

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