How many groups are there in Monet's masterpiece Water Lily? Is Van Gogh or Monet guiding the painting style of this school?

It's 48 pairs, waiting for the color of water lilies at different times and in different environments from morning till night. Drawing the color impression of the same object in different periods is called impressionism. Also of the same nature is his painting Rouen Cathedral. Manet was the originator of this school, but he didn't want to admit it himself, so later recognized leaders were Monet, Renoir, Degas and so on. Monet mainly paints landscapes, while Renoir paints people. As for Van Gogh, he is a representative of post-impressionism.