You will be given a big integer, you should return the square root of it.
Project Euler: Problem 5, Smallest multiple
Generate a random matrix A of (1,-1)
Given a 4x4 matrix, swap the two middle columns
Area of an Isoceles Triangle
Solve Sudoku puzzle step by
Find the right number make the equation
Successive zeros (harder)
Determine if input is a perfect number
Put m balls into n boxes (again)
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