数学建模五连珠问题程序。输入n，m，得出一个在n*m大的棋盘上，至少去掉多少个棋子使五连珠情况不存在。-Mathematical Modeling for Five Pente procedural issues. Enter n, m, a draw on the n* m chessboard, at least get rid of the number of pieces to make five Pente absence.