XMzhou的专栏

ProblemYou are given two vectors v1=(x1,x2,...,xn) and v2=(y1,y2,...,yn). The scalar product of these vectors is a single number, calculated as x1y1+x2y2+...+xnyn.Suppose you are allowed to perm

ProblemYou are given an N x N matrix with 0 and 1 values. You can swap any two adjacent rows of the matrix.Your goal is to have all the 1 values in the matrix below or on the main diagonal. That i

ProblemIn a kingdom there are prison cells (numbered 1 to P) built to form a straight line segment. Cells number i and i+1 are adjacent, and prisoners in adjacent cells are called "neighbours." A

ProblemYou have been invited to the popular TV show "Would you like to be a millionaire?". Of course you would!The rules of the show are simple:Before the game starts, the host spins a wheel o