public void Test1()
{
/*
* Pentagonal numbers are generated by the formula, Pn=n(3n−1)/2. The first ten pentagonal numbers are:
* 1, 5, 12, 22, 35, 51, 70, 92, 117, 145, ...
* It can be seen that P4 + P7 = 22 + 70 = 92 = P8. However, their difference, 70 − 22 = 48, is not pentagonal.
*/
var sut = new E044Pentagonnumbers();
//Assert.True(sut.HasSubstringdivisibility(1406357289));
//Assert.True(sut.HasSubstringdivisibility(4160357289 ));
//Assert.False(sut.HasSubstringdivisibility(1406395728));
}
public void Solution()
{
/*
* Find the pair of pentagonal numbers, Pj and Pk, for which their sum and difference are pentagonal
* and D = |Pk − Pj| is minimised; what is the value of D?
*/
var sut = new E044Pentagonnumbers();
Assert.Equal(5482660, sut.GetMinimumD());
/*
* Congratulations, the answer you gave to problem 44 is correct.
*
* You are the 50969th person to have solved this problem.
*/
}
