Given n people, everyone must have pictures taken with everyone, each photo includes only two persons, please count the total number of pictures.
Least common multiple of many numbers
Find the sum of the elements in the "second" diagonal
"Low : High - Low : High - Turn around " -- Create a subindices vector
We love vectorized solutions. Problem 1 : remove the row average.
Area of an equilateral triangle
Check if sorted
How to subtract?
swap sign sum & multiply castles
A Simple Tide Gauge with MATLAB
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