Young Mathematician Olympiad, 2021-2022, Stage B, Grades 7-8

注讚 砖讛砖讗诇讜转 讬讜讻谞住讜 诇讗转专, 谞讬转谉 诇专讗讜转 讗转 讛砖讗诇讜谉 讛诪拽讜专讬 讻讗谉