摘要:
迭代加深ID-DFS搜索算法迭代加深搜索,实质上就是限定下界的深度优先搜索。即首先允许深度优先搜索K层搜索树,若没有发现可行解,再将K+1后重复以上步骤搜索,直到搜索到可行解。迭代加深搜索算法的实现原理及基本框架在迭代加深搜索的算法中,连续的深度优先搜索被引入,每一个深度约束逐次加1,直到搜索到目标为止。基本框架如下:ProcedureID-dfs(dep:integer);VarJ:integer;BeginIfdep>深度的限界thenexit;//如果搜索的深度大于限界,则返回上一层Forj:=1tondo// 按照规则生成子结点If子结点安全thenBegin入栈;If子结点是目 阅读全文
摘要:
Humble NumbersFor a given set of K prime numbers S = {p1,p2, ..., pK}, consider the set of all numbers whose primefactors are a subset of S. This set contains, for example, p1, p1p2,p1p1, and p1p2p3(amongothers). This is the set of `humble numbers' for the input set S. Note: Thenumber 1 is expli 阅读全文