149. Perhaps the grading standard of the marking teacher may be different from Shen Wei's answer, because the answer was too perfect and was deducted 1, and Shen Wei only took 149. Wei Dongyi, assistant professor of Peking University, researcher in the teaching and research section of differential equations of Peking University Institute of Mathematical Sciences, got full marks and won the first place in the 49th and 50th International Mathematical Olympiad; In 20 13, he won the Chinese prize in the mathematics competition for college students.