There are 58 pieces of sugar on the plate. Lele and Youyou take turns to take 1~3 sweets each time (they take 4 sweets each time).
Because two people must get enough 4 pieces at a time, which is 58 divided by 4. * * * After taking 14 rounds, there are 2 pieces left in the tray; Therefore, Lele only needs to directly remove the last two pieces when taking sugar at 15; Or more directly, Lele takes two pieces at a time, which can guarantee to get the last two pieces;