Problems from Criterion 2022 Round 15

These problems are from a contest organized by Furqan Software on February 25, 2022 at 2:30 PM UTCSee details...

Standings
A. Reverse Hash
Binary strings are strings that can only have 0 or 1 as the characters. The hash value of a string i...
B. Easy But Easy Game
Alice and Bob are playing a game on a string s of length n consisting of characters ‘0’ and ‘1’. The...
C. The Matrix
In the metaphysical world of the Matrix, different people make their chessboards with their own spec...
D. Land of Riches
Mankind has recently discovered the secret wealth in Mars. Many powerful countries are trying to get...
E. Counting Matrices
Given a natural number N and a prime p, let’s define a special set Zp​={0,1,2,…,p−1}. Now count the ...
F. Wireless Signal
The city of Byteland is rectangular in shape and can be represented as a 2D coordinate system with n...
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