Given a year and a weekday, determine how many months of that year had five of those weekdays. It is kind of easy to find.
y = 2014
d = 'Sun'
result = 4
Sorry for this little hack here... ;-)
Find the peak 3n+1 sequence value
7 segment LED display
Given a 4x4 matrix, swap the two middle columns
Sum the numbers on the main diagonal
Area of an Isoceles Triangle
Integer Sequence - II : New Fibonacci
Graph Algorithms - 2 : Chromatic Number
remove single elements
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