Assume there are totally 36 different types of Pokemon. And for each type, there is an infinite number of cards for sale. Each time when you buy a Pokemon card, you can only get a random type (with an equal probability for any type). You want to know on average how many cards you need to buy to collect a full set of 36 Pokemon cards.

A program in R to do 1,000 times of experiments to see how many cards you need to buy each time. Draw a histogram to show the distribution.