Blog

Task The first line of the input will give the number of test cases, T. In each test case, a string S is given. You have to find string p of minimum length such that there exists a positive integer k for which p*k=S. Sample Input 5 ABAB ABABABABAB ASDA ASAASA B Sample Output ABRead more

Sometimes, to find the inverse of a matrix is a labor-consuming task or even “disgusting”, especially when the matrix is “ill”. It is said, e.g. in Julia, that the left/right division operation is more stable than the bare inv. So, does there exist the similar functionality in Mathematica? Of very close relation, at least thereRead more

I have a schema Students (sID, sFName, sLName, sUMEmail) Sections (cID, sectID) Enroll (sID, cID, sectID, grade) where FOREIGN KEY (sID) REFERENCES Students, FOREIGN KEY (cID, sectID) REFERENCES Sections Suppose I want to Find the IDs of students who take all sections of COMP 3060. how do I properly do this? I know it requiresRead more