def matrixRotation(matrix, r):
    # Write your code here
    hDim = len(matrix[0])
    vDim = len(matrix)
    nbLayers = min(vDim / 2, hDim / 2)
    
    
    for layerNb in range(int(nbLayers)):
        
        innerVDim = vDim-layerNb*2
        innerHDim = hDim-layerNb*2
          
        # massive speed increase! why moving everything to end at the same point?
        fullRotationMoves = innerVDim*2+innerHDim*2-4
        rotationsToDo = r % fullRotationMoves
        
        for rr in range(rotationsToDo):
            bottomLeftHold = matrix[-1 - layerNb][layerNb] + 0  # bottom left
            topRightHold = matrix[layerNb][-1 - layerNb] + 0  # top right


            # move down on the left
            for iD in reversed(range(layerNb, layerNb+innerVDim)):
                if iD > 0:
                    matrix[iD][layerNb] = matrix[iD - 1][layerNb] + 0


            # move up on the right
            for iU in range(layerNb, layerNb+innerVDim-1):
                if iU < layerNb+innerVDim:
                    matrix[iU][hDim - 1 - layerNb] = matrix[iU + 1][hDim - 1 - layerNb] + 0


            # move bottom to right
            if innerHDim > 2:  # only if the horizontal dimension is > 2
                for iR in reversed(range(layerNb+1, layerNb+innerHDim)):
                    matrix[-1 - layerNb][iR] = matrix[-1 - layerNb][iR - 1] + 0


            # move top to left
            if innerHDim > 2:  # only if the horizontal dimension is > 2
                for iL in range(layerNb, layerNb+innerHDim-1):
                    matrix[layerNb][iL] = matrix[layerNb][iL+1] + 0


            # apply bottomLeftHold
            matrix[-1-layerNb][layerNb+1] = bottomLeftHold+0
            # apply topRightHold
            matrix[layerNb][layerNb+innerHDim-2] = topRightHold+0

        

    for i in range(m):
        print(' '.join(map(str, matrix[i])))
    return matrix