在一个田径运动会上，已知有m个选手参加比赛，运动项目共有n个，这包括若干个诸如100m之类的以个人形式参加的单项和4×100m之类的多人参加的集体项目。另外，每位选手最多可参加3个单项，集体项目则不限制。为使选手能正常比赛，需要对赛程作合理安排。请构造出有关模型和数据结构，设计出合理安排赛程的算法和程序，以使每位选手都能正常地参加比赛，并要求比赛时间尽可能短-In a Track and Field Games, a player known to have m race, sports a total of n months, including a number of categories such as the 100m individual forms of participation of the individual and the 4 × 100m people like to participate in collective projects. In addition, each player may participate in a maximum of three individual and collective projects are not restricted. To enable the player to normal competition, the need to schedule to make reasonable arrangement. Please constructed on the model and data structure, reasonable arrangement designed algorithms and program schedule, so that each player will normally participate in the competition and called for playing time as short as possible