Much starchy kinds.

Pasta, Bread, Potatoes, Rice, any kind of grain/flour are complex carbohydrates. I guess that is what you are asking about. Simple carbohydrates are sugars, white sugar, honey, cane sugar, syrup, etc.

You can find carbs in range food, including milk (containing lactose, or milk sugar), fruits (containing fructose, or fruit sugar) and sugar beet (containing sucrose).
Starch-carbs are found in all cereal grains, as well as roots and tubers. Starchy foods include: bread, pasta, rice, noodles, couscous, tapioca, potatoes, sweet potatoes and yams.