一个挺效率的16皇后算法,全部用位运算实现.-a rather efficient 16 Queen's algorithm, using all Operators to achieve.

计算24点游戏：任意输入4位数字，利用+,-,*,/四则运算使之得到结果 24。输出所有不同算法的计算表达式，可为运算优先级而使用括号。-Calculation of 24-point game: any input four digits, use+,-,*,/four operations so get results 24. Output all the different algorithms compute expressions for computing priorities an

百位内四则运算游戏。可以自行选择游戏类型（运算类型）或者随机选择。为了限制游戏难度故限制为百位内。-One hundred within four arithmetic game. You can choose the game type (type of operation) or a random selection. To limit the difficulty of the game and therefore within the limit of one hundred.