Input n: is an positive integer which serves as the dimension of the matrix A;
Output: A=(Aij),where each entry Aij is either 1 or -1 which is generated
For n<1 the function should deliver an empty matrix.
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Knight's Tour Checker
Generate a vector like 1,2,2,3,3,3,4,4,4,4
Sum the elements in either diagonal of a square matrix
Area of a triangle
Travelling Salesman Problem (TSP)
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