算法的许多例子都是最优化问题（ optimization problem），每个最优化问题都包含一组限制条件（ c o n s t r a i n t）和一个优化函数（ optimization function），符合限制条件的问题求解方案称为可行解（ feasible solution），使优化函数取得最佳值的可行解称为最优解（optimal solution）。-algorithm are many examples of optimization problems (optimization problem). Each issue contains a set of optimized constraints (c o n s t r a n t i), and an optimization function (opti mization function). meet the restrictions in the problem-solving program called feasible solution (feasible solution). make optimal function to achieve the best possible value of the solution as the optimal solution (optimal solution).