Given n people, everyone must have pictures taken with everyone, each photo includes only two persons, please count the total number of pictures.
Remove all the words that end with "ain"
First N Perfect Squares
Back to basics 21 - Matrix replicating
swap sign sum & multiply castles
peta to nano (x-ray)
Given an unsigned integer x, find the largest y by rearranging the bits in x
Distance walked 1D
Choose a web site to get translated content where available and see local events and offers. Based on your location, we recommend that you select: .
You can also select a web site from the following list:
Select the China site (in Chinese or English) for best site performance. Other MathWorks country sites are not optimized for visits from your location.
Contact your local office