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[해커랭크] Forming a Magic SquareWe define a magic square to be an matrix of distinct positive integers from to where the sum of any row, column, or diagonal of length is always equal to the same number: the magic constant.You will be given a matrix of integers in the inclusive range . We can convert any digit to any other digit in the range at cost of . Given , convert it into a magic square at min..

[해커랭크] Stone DivisionConsider the following game:There are two players, First and Second, sitting in front of a pile of stones. First always plays first.There is a set, , of distinct integers defined as .The players move in alternating turns. During each turn, a player chooses some and splits one of the piles into exactly smaller piles of equal size. If no exists that will split one of the ..