Given n people, everyone must have pictures taken with everyone, each photo includes only two persons, please count the total number of pictures.
Add two numbers
Find state names that start with the letter N
Given two strings, find the maximum overlap
Return 'on' or 'off'
Sum the numbers on the main diagonal
wait for me
Calories in a slice of pizza?
How to multiply?
Vectorizing, too easy or too hard?
Dick Van Dyck?
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