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Pavel has asked 21 questions and find answers to 5 problems.

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Pavel questions

What is a family of digraphs whose number of directed cycles grows exponentially?
How do you disable expansion in QTreeWidget/QTreeView?
Is there a shortcut to implement interface methods in intellij?
How can I prove that this edge traversing algorithm works?
How does the type deduction work for string literals in C++?
What is the expected number of subarrays of size 0, 1 and 2 when quicksort is used to sort an array of N items with distinct keys?
How do you stick a QDialog into a custom delegate?
How do I make visual studio show exceptions that any method may throw?
How can I evenly distribute distinct keys in a hashtable?
How to throw 2 eggs from a building and find the floor F with ~c*sqrt(F) throws?

Pavel answers

Why is the output (Nan,Nan)? [duplicate]
java.lang.RuntimeException: Unable to start activity ComponentInfo
Cant use shared libraries in Qt project
Algorithms: Using maximum flow to calculate correct matrix values