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codefan/codeForFun

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趣味编程

计算24点

×ばつ/和括号。 代码参见Calculation24.java

算法有三个点:

  • 对给出的4个数字进行排列组合,需要去掉相同数值重复的问题。
  • 对每一个排列用逆波兰式插入3个运算符,运行符位置用枚举法,一共5种。
  • 对符合结果的逆波兰式转换为带括号的四则元素,不同的逆波兰式转换为四则运算可能重复。

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