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Question: Let the race for a total of seven projects Track Meet, respectively, 100 meters, 200 meters, high jump, long jump, shot put, discus and javelin. Up to each player to participate in three projects, the existing six contestants, their choice of items shown in Table 1-1. Taking into account the participation of each project can not be carried out at the same time each player is how well-designed game schedule, so games completed in the shortest possible time?